Belifu YF1503 - User Manual

This document describes the Belifu TENS/EMS device, model YF1503, designed for pain relief and muscle stimulation.

Function Description

The device operates by applying electricity pulse waves to the human body. This electrical energy is absorbed, leading to physical and chemical changes that produce local or systemic physiological reactions, thereby influencing pathological processes and providing therapeutic effects.

Intended Use:

• TENS Mode: Used for temporary relief of pain and recovery from fatigue associated with sore and aching muscles due to strain from exercise or normal household work activities.
• EMS Mode: Used to stimulate healthy muscles to improve and facilitate muscle performance.

Applicable People: Adults experiencing sore and aching muscles in the shoulder, waist, back, neck, upper extremities (arms), and lower extremities (legs) due to strain from exercise or normal household work activities can use this device.

Warnings (Do Not Use Under Below Conditions):

• If using an implanted electronic medical device (e.g., pacemaker).
• If wearing any electrode medical devices for monitoring health functions.
• While driving or sleeping.
• In areas with high humidity, such as a bathroom.
• On children or infants (device not evaluated for pediatric use).
• If experiencing pain discomfort, dizziness, or nausea (consult physician).
• Do not move electrode pads while the device is in operation.
• Near the heart, on the head, near the mouth, genitals, or blemished skin areas.
• Over or in proximity to cancerous lesions.
• In the presence of electronic monitoring equipment (e.g., cardiac monitors, ECG alarms), which may not operate properly.
• Pregnant women.
• Persons incapable of expressing thoughts or intentions.
• If you have epilepsy.
• If pain does not improve, becomes more than mild, or continues for more than five days (consult physician).
• Over open wounds, rashes, swollen, red, infected, or inflamed areas or skin eruptions (e.g., phlebitis, thrombophlebitis, varicose veins).
• After drinking alcohol.
• When using high-frequency surgical instruments (low-frequency therapeutic instruments cannot be used).
• Near the genitals.
• Near shortwave or microwave therapeutic equipment (e.g., within 1m) where the output of the low-frequency therapeutic instrument is unstable.
• With high-frequency surgical equipment and stimulator (risk of burns and stimulator damage).
• On patients undergoing medical treatment and feeling abnormal.
• On heart patients with neurological abnormalities in the brain.
• On patients whose body temperature exceeds 38°C.
• On patients with infectious diseases.
• On patients who cannot express their will.
• While charging.

Notice (Caution should be used in the presence of the following):

• Electrode wire is too long and may cause suffocation. Keep away from children.
• Stimulators should not be used in the throat and mouth, as this may cause severe throat muscle spasms, muscle contraction, airway blockage, and dyspnea.
• Application of electrodes near the thorax may increase the risk of cardiac fibrillation.
• This stimulator should not treat unattended patients or those suffering from emotional distress, dementia, and low IQ.
• Improper use may lead to danger.
• Do not use for undiagnosed pain symptoms; consult a doctor for diagnosis before use.
• Electrodes cannot be placed on arteries, the head, and the pubic area.
• Patients with heart disease, cancer, or other health-threatening conditions should consult a doctor before use.
• If stimulation intensity is uncomfortable, reduce it to a comfortable level. If problems persist, contact your doctor.
• Do not use in rooms where aerosol (spray) and pure oxygen are used.
• Do not use near highly flammable substances, gases, or explosives.
• Check cables and connections are in good condition before each use.
• Turn off the device before using or removing the electrode pad.
• Only use electrode wires and electrodes recommended by manufacturers.

Consult your doctor before using the device, especially in the following cases:

• Acute disease, especially patients suspected or suffering from hypertension, thrombosis, or malignant mass.
• Patients with various skin diseases.
• Patients with chronic pain disorders (e.g., metabolic disorders) with reduced pain.
• Patients undergoing medication.

Adverse Reactions:

• Skin allergies caused by electrode sheetpad gels and electrode irritation burns are potential adverse reactions. Discontinue use and consult a doctor if sensitive skin reactions occur.
• If stimulation intensity is uncomfortable, reduce it to a comfortable level.

Contraindications: Do not use this device if you have an implanted electronic device, such as a cardiac pacemaker, implanted defibrillator, or other implanted metallic or electronic device, unless specialist medical opinion has first been obtained. Such use could cause electric shock, burns, electrical interference, or death.

Potential Electromagnetic and Other Interference: This product is sensitive to electromagnetic interference. Interference may occur when:

• Talking on a mobile phone.
• Near a base station for signal transmission (broadcast, television, communications, radar, navigation, etc.).
• Near high radiation medical instruments such as nuclear magnetic resonance. The operator should move away from the equipment as soon as possible if essential performance is degraded or lost due to EM disturbances. The essential performance should be restored; if not, contact your seller.

Important Technical Specifications

• Product Name: TENS
• Model: YF1503
• Charge Time: About 2 hours
• Battery Run Time: About 8 hours
• Lithium Battery Power Supply: 3.7V/180mAh
• Load Resistance: 500Ω
• Output Frequency: 1Hz~110Hz
• Maximum Pulse Width: 180uS
• Velocity Pulse Amplitude: 0~98 Vpp
• Low Voltage Protection: MAX≤3.3V
• Weight: 102g
• Size: (L)110mm*(W)65mm*(H)18mm
• Number of Channels: 2
• Treatment Time: 10-80 minutes (adjustable)
• AC Adapter: 110V-240V
• Charging Interface: TYPE-C USB
• Display: LCD liquid crystal
• Operating Environment Temperature: 5℃~40℃ (41.0℉~104℉)
• Battery Capacity: 180mAH

Usage Features

Package Contents:

• Device: 1 pc
• Manual: 1 pc
• Lead wires with 2 connectors (2.5mm): 2 pcs
• Large self-adhesive electrode pads: 1 pair
• Medium self-adhesive electrode pads: 3 pairs
• Small self-adhesive electrode pads: 1 pair
• USB cable: 1 pc
• Storage bag: 1 pc

Device Features:

• 24 modes
• 36 intensity levels
• 20-minute default timer, adjustable from 10-80 minutes or continuously.

Operating Instructions:

1. Preparation: Check for damage to the device, electrode leads, or pads. Ensure lead connections are not broken and the device is fully charged. Clean skin before use; apply pads to clean, flat areas free of sweat and oil. Attach one or two pairs of pads to the massage area.
2. Connecting Electrodes: Connect electrode pads to the electrode wire, ensuring snap connections are fastened. Use at least one pair of pads; a single pad will not work.
3. Applying Pads: Paste electrode pads to the desired therapy area. When using one wire with two connectors, ensure both pads are stuck to your body. When using two wires, ensure at least two pairs of pads are stuck to your body. Confirm wires are plugged in and pads are stuck to skin before adjusting the unit.
4. Connecting to Device: Connect the electrode wire to the device's channel A/B output.
5. Power On: Long press the upper-right "Power/Pause" button to turn on the device. (Short press is for the pause function).
6. Channel Selection: Press the "A" or "B" button to choose channel A or B mode. The flashing "A" or "B" icon indicates the active channel. Both channels are independent, allowing different modes and intensity levels.
7. Mode Selection: Short press the "<M" or "M>" button to choose a desired mode. Intensity defaults to zero when changing modes. Start with the lowest intensity and gradually increase to a comfortable level.
8. Intensity Adjustment: Short press the upper-left "+" or "-" button to adjust the A/B intensity.
9. Time Setting: Short press the upper-right "Time/Lock" button to set the treatment time. The default is 20 minutes, adjustable in 10-minute increments up to 80 minutes. (Long press is for the lock function).
10. Lock Function: Long press the "Time/Lock" button to lock the unit after settings are complete.
11. Power Off: Long press the "Power/Pause" button to turn off the device if not needed. The device automatically turns off when the timer runs out.
12. Post-Use: Gently remove pads from skin, paste the plastic dust-proof film back on them, disconnect from electrode wires, unplug wires, and store the device and pads in the storage bag. Do not tear off pads vigorously or remove them before turning off the device.

Troubleshooting:

• Painful burning sensation or weakened stimulation: Pads not adhering firmly or too dry. Apply a few drops of water to the adhesive surface and press firmly.
• Unit on, but no sensation: Pads not firmly on skin, loose connection, or intensity too low. Ensure pads are pressed firmly, connections are secure, and increase intensity.
• Pads not sticking: Pads need replacement. Contact support@belifu.com.
• Unit not turning on or screen dim: Battery is low. Recharge the battery.
• Inadequate pain relief: Not using long enough. Use 20-30 minutes at a time, 3-6 times per day.
• Modes/channels flash, cannot select mode/adjust intensity: Always use two pads (one channel) or four pads (two channels). Ensure all pads are placed on the body.
• Pulses strong on one side, weak on the other: Different nerve distribution, skin sensitivity, or insufficient skin contact. Wipe skin with a wet towel before use. Electrodes should be symmetrical.
• Key failure: Machine is locked or paused. Press "LOCK" to unlock or "PAUSE" to continue.
• Feeling unwell (too strong, too close electrodes): Electrodes/conductors damaged, or electrode area too small. Decrease intensity, reorient electrode position, or replace wire/pads.

Maintenance Features

Charging the Battery: The device uses an internal, rechargeable lithium battery. Charge via a standard wall outlet or USB port (computer/power bank). Signs of low battery include dim screen, failure to display, or weak sensations. Turn off the device, connect the controller and charger with a USB extension cord, and plug into a power outlet. Charging takes 1-2 hours.

Memory Function: The device remembers the selected mode. The mode will remain the same as before pause and shut down.

Cleaning and Storing the Main Machine: Clean the main machine frequently with a soft, dry cloth. Do not wash with water or use detergents, thinners, volatile oils, or other chemical substances.

Cleaning and Storing Pads:

• Keep the gel surface of the massage pad clean, free from dust, oily substances, or sticky substances, as these decrease stickiness.
• After use, place massage pads back on pad holders or re-apply protective films.
• If stickiness weakens due to dirt or if a tingling sensation occurs, gently wipe the gel surface with a damp cloth dipped in a little water. Stickiness will recover after drying. Avoid overusing water, as it can decrease stickiness. Do not wipe the gel surface with a paper towel.
• Do not scrape the gel surface with nails, brushes, etc.
• Massage pads are consumables with a service life of generally 20-30 uses. Replace pads if they are no longer sticky or the pulse becomes weak.

Safekeeping:

• Do not place the main machine in direct sunlight, high temperature, humidity, dusty areas, or near fire, or in places prone to vibration or shock.
• Keep out of reach of children.
• Do not keep the device in areas subject to direct sunlight, high or low temperatures, humid areas, near fire, vibration, or shock.

Warm Tips for Skincare (to avoid skin irritation, especially for sensitive skin):

1. Wash the skin area where electrodes will be placed with mild soap and water before applying and after removing electrodes. Rinse soap off thoroughly and dry skin well.
2. Clip excess hair with scissors; do not shave the stimulation area.
3. Wipe the area with skin preparation wipes and let it dry before applying electrodes.
4. To prevent "pulling stress" from adhesive patches, apply electrodes from the center outward, avoiding stretching over the skin. To minimize "pulling stress," tape extra lengths of lead wires to the skin in a loop.
5. When removing electrodes, always pull in the direction of hair growth.
6. Rub skin lotion on the electrode placement area when not wearing electrodes.
7. Never apply electrodes over irritated or broken skin.

Warranty:

• Warranty period is two years from the date of delivery. Proof of delivery (sales receipt or invoice) is required for claims.
• Repairs under warranty do not extend the warranty period.
• Cases not included in warranty: Damage due to improper treatment (e.g., non-observance of user instructions), repairs or tampering by unauthorized third parties, damage during transport, and normal wear and tear of accessories.
• Liability for direct or indirect consequential losses is excluded, even if damage is accepted as a warranty claim.
• For any device-related inquiries, contact support@belifu.com.