This document provides a quick start guide for the HTC True Wireless Earbuds 1+, model HTC TWS4.

Function Description:

The HTC True Wireless Earbuds 1+ are a pair of Bluetooth earbuds designed for wireless audio playback and hands-free calling. They come with a charging case that not only stores the earbuds but also recharges them on the go. The earbuds feature touch controls for managing media playback, calls, and activating a voice assistant. They are designed for convenience and portability, offering a seamless wireless audio experience.

Important Technical Specifications:

Model: HTC TWS4
Bluetooth Version: 5.3
Bluetooth Range: ≤ 10 meters
Play Time: Approximately 7 hours (at 50% volume level)
Talk Time: Approximately 3.5 hours (at 50% volume level)
Standby Time: Up to 70 hours
Earbud Battery Capacity: 45 mAh
Charging Case Battery Capacity: 400 mAh
Charging Case Input Voltage: 5V
Charging Interface: USB Type-C
Charging Case Power Input Rating: 5V / 320 mA
Net Weight (single earbud): 4 g
Net Weight (both earbuds with case): 43 g
Sweat and Water Resistant: IPX4
Noise Cancellation: ENC (Environmental Noise Cancellation)
FCC ID: 2AVFE-HTCTWS4 (for the left earbud)

Usage Features:

Automatic Power On/Off: The earbuds automatically turn on when removed from the charging case and turn off when placed back in the case.
Easy Pairing: To pair, simply remove the earbuds from the charging case, go to Bluetooth settings on your phone, and select "HTC TWS4." Once paired, the earbuds will automatically connect to your mobile device when taken out of the charging case.
Touch Controls:
- Power On/Off: Automatic (by removing/inserting into case).
- Play Next: Tap and hold the earbud for 2 seconds.
- Play Previous: Tap and hold the earbud for 5 seconds.
- Play / Pause: Tap earbud.
- Answer call / End call: Tap earbud.
- Decline call: Tap and hold earbud for 2 seconds.
- Assistant: Triple-tap earbud.
LED Notifications:
- Charging Case LED:
  - One light: Over 30% charged.
  - Two lights: Over 60% charged.
  - Three lights: Fully charged.
  - Flashing blue: Connected to power and charging.
  - Blue on all LEDs: Case is fully charged.
  - Flashing blue on the first LED: Low battery warning.
  - Blue: Charging the earbud.
- Earbud LED:
  - Red: Charging.
  - Blue: Pairing.
  - Off: Fully charged or paired with mobile device.
Reset Functionality: If an earbud is not shown in the Bluetooth list, it can be reset by quickly tapping it 5 times. The LED will flash red, and placing it back in the charging case completes the factory reset.
Automatic Disconnection: If the earbud is on but not connected to any mobile device, it will automatically turn off after 5 minutes.

Maintenance Features:

Initial Charging: Before using the charging case for the first time, ensure it is charged using a 5-volt charger.
Protective Film: Before initial use, remember to tear off the protective film on the earbuds.
Temperature Considerations: The HTC True Wireless Earbuds 1+ should not be used in extreme temperatures.
Regular Charging: When not in use, place the earbuds in the charging case to keep them charged. Recharge the case periodically with a 5V charger.
Product Authenticity Check: The product includes a scratch-off code and QR code on the packaging to verify authenticity. Users can scan the QR code with their phone and enter the last four digits of the scratch-off code to confirm if the product is genuine. This helps in preventing counterfeiting.
FCC Compliance: The device complies with Part 15 of the FCC Rules, indicating it has been tested and found to comply with limits for a Class B digital device. Users are advised on measures to correct potential interference, such as reorienting antennas or increasing separation between equipment. Any unauthorized modifications to the unit could void the user's authority to operate the equipment.

HTC TWS4 - Page 6

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