A4Tech B20 Ash Grey

A4Tech True Wireless Earphones

Diaphragm Hybrid

Advanced biotechnology, carbon fiber, and cultured nano mycelium make up M.O.C.I. Featuring 2Drumtek’s Signature Sound, which produces deep, gratifying bass along with clear trebles and middle.

Bluetooth

Steady connection is provided via advanced Bluetooth v5.2. Compatible with tablets, smartphones, laptops, PCs, and other gadgets.

20-Hour Playback Time

Each charge can extend the battery’s lifespan by up to five hours. Just use the metal charging case to recharge your earbuds for an additional fifteen hours of playback.

Control

You can use them to quickly pair, play the previous or next music, make and receive calls, and access voice assistants like Siri with only a finger touch.
When you take your phone out of the case, it immediately connects to your phone.

ENC noise reduction

For a crystal-clear conversation, the ENC noise cancellation microphone eliminates background and ambient noise.

Specification

• 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)
• Music Playtime with Single Charge: ≈5H (50% Volume Data)
• Earphones weight: 4g
• Case weight: 39g