A4Tech B20

A4Tech B20 2Drumtek

Hybrid Diaphragm

M. O. C. I. is made of advanced biotechnology with bred nano mycelium and carbon fiber. Featuring 2Drumtek's Signature Sound, pushing out crisp trebles and midrange with deep, satisfying bass.

Bluetooth V5.2

Advanced Bluetooth v5.2 provides a steady connection. Compatible with PC, laptops, mobile phones, tablets, and other devices.

Playback Time 20H

Battery life can last for up to 5-hours per charge. Simply recharge your earphones for another 15-hours playtime with the aluminum charging case.

Control At Your Fingertips

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

Quick Pairing

Automatically connected to your phone as soon as you pull out from the case after first connecting.

Transmission Independently

The earbuds can take calls using either, or both, of the earbuds. This allows you to alternate their recharging.

Enter Voice Assistant

Go smarter with your favorite voice assistant, Google Assistant and Amazon Alexa and Siri, etc.

Water Resistant (IPX4)

Ideal for those with an active lifestyle, you can work out to your favorite tunes and have the freedom to wear these wireless earbuds during a variety of outdoor activities.

 

Tech specs

Speaker Size

13 mm

 

Frequency Response

20 Hz-20 kHz

 

Earphone Sensitivity

102 dB @ -10 dBFS

 

Mic. Sensitivity

-42 dB @1 kHz/Pa

 

Earphone Impedance

32 ohm

 

Bluetooth Version

v5.2

 

Operation Distance

10 m

 

Earphone Battery Type

Lithium Battery (40 mAh)

 

Charging Case Battery Type

Lithium Battery (380 mAh)

 

Charging Power

5V=500mA

 

Earphone Charging Time

＜1.5H (Low Battery to Fully Charged)

 

Case Charging Time

＜1.5H (Low Battery to Fully Charged)

 

Music Playtime with Single Charge

≈5H (50% Volume Data)

 

Playtime from Charging Case

≈20H (50% Volume Data)

 

Earphones weight

4g