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General| Model | S91 |
|---|---|
| Category | Speakers |
| Signal-to-Noise Ratio | ≥80dB |
| Impedance | 4Ω |
| Power Supply | DC 5V |
| Brand | Hongdian |
| Connectivity | Bluetooth |
| Power Source | Battery (Rechargeable Battery) |
| Frequency Response | 100Hz |
Utilizes Bluetooth for mobile phone connectivity and smart speaker functionality.
Includes time adjustment, screen saver, and HD clock projection with adjustable brightness.
Features dual alarms with snooze, gradual ringtones, and DIY ringtone capability.
Supports Bluetooth, FM, AUX, and TF card playback with timing options.
Compatible with Bluetooth V4.2+BR+EDR+BLE, supports hands-free calling.
Supports AUX-in for external audio sources.
Operates on FM frequency range of 87.5-108MHz.
Allows restoring factory settings with a single key.
RMS 2*5W output with specified THD+N, impedance, and frequency.
SNR is greater than or equal to 75dB.
Distortion is less than or equal to 1%.
Frequency response range is 80Hz-18KHz.
Accepts input via Bluetooth, AUX, TF Card, and FM.
Restores factory settings using a hidden reset switch.
Turns on the device, enters clock mode, and cycles through functions with the 'M' key.
Features 16 volume levels, memorizes last setting, and defaults to 10.
Adjusts screen brightness and activates screen saver after inactivity.
Short press to display current time projection, toggle between reversed and positive display.
Long press the 'Projection' button for three levels of brightness adjustment.
Rotate the projection head for angle and slide turbine for focus sharpness.
Set hour by long pressing 'M' key, then minute setting and confirmation.
Configure up to two alarms with hour, minute, and ringtone selection.
Manage alarm status, cancel alarms, and utilize snooze function.
Long press 'Snooze' to record a 10-second ringtone.
Choose recorded sound as a custom alarm ringtone.
Press 'M' key to switch to Radio state.
Long press 'Play' key for automatic radio receiver tuning and station saving.
Use 'Previous/Next' for station selection or semi-automatic search.
Mute/unmute and adjust volume during radio playback.
Supports MP3/WMA formats; displays track number and progress.
Select songs or fast forward/reverse using 'Previous/Next' keys.
Play/pause music and adjust volume for TF card content.
Switch to Bluetooth state; display shows 'BLUE' and Bluetooth icon flashes.
Search for and connect to 'S91' device; automatic reconnection to last paired device.
Play music from a connected smartphone via Bluetooth.
Quickly press 'Play' button twice to call back, hang up, or connect during a call.
Insert 3.5mm plug into 'AUX' socket; 'AUX' icon lights up.
Mute/unmute and adjust volume for external audio sources.
Supports timing playback for Bluetooth, TF, FM, and Audio Input modes.
Select intervals from SL10 (10 min) to SL90 (90 min) or turn off timing play.
Device complies with Part 15 of FCC Rules; subject to two conditions.
Unauthorized changes may void user's authority to operate the equipment.
Guidelines to correct harmful radio/TV reception interference.
Device meets general RF exposure requirements for portable use.
