Bluetooth headphones-plugs A4tech B20 2Drumtek, Mint green

Bluetooth headphones-plugs A4tech B20 2Drumtek, True Wireless, mint color

Hybrid Diaphragm-The headphones have a built-in hybrid diaphragm of the dynamic speaker. It is made of two types of materials, which are combined into one diaphragm. They are made using modern Japanese biotechnology, with grown nano micelle and carbon fibers. In this way, a balance is achieved between mid and high frequencies with deep bass

Bluetooth 5.2- Provides a stable connection up to 10m without interference

With just a touch of your finger, you can use them to play previous/next song, receive/end calls, access voice assistant (Siri, etc.)

The headphones can take calls using one or both earbuds. This allows you to alternate between charging them.

Battery life can last up to 5 hours on a single charge. Then recharge your headphones for another 15 hours of playback with the aluminum charging case.

Speaker diameter: 13 mm
Frequency range: 20 Hz-20 kHz
Headphone sensitivity: 102 dB @ -10 dBFS
Microphone sensitivity: -42 dB @1 kHz/Pa
Headphone impedance: 32 ohm
Bluetooth version: v5.2
Range: 10 m
Headphone battery: Lithium Battery (40 mAh)
Battery box: Lithium Battery (380 mAh)
Supply voltage/current: 5V=500mA
Headphone charging time: ＜1.5H (full charge)
Charging time for the case: ＜1.5H (full charge)
Playback on 1 charge (earphones): ≈5H (50% volume)
Playback with 1 charge (case): ≈20H (50% Volume Data)
Headphone weight: 4g
Total weight: 39g