Chipset: Bluestrum
ANC Depth: 20dB ± 2
Chipset: Bluestrum + AMS
Bluetooth version: 5.0V
Transmission distance: ~10m
Speaker drive: 40mm
Impedance: 32ohm
Frequency: 20-20kHz
Speaker Sensitivity: 105 ± 3db
Microphone sensitivity: -40db ± 3
Battery capacity: 400mAh
Working voltage: 3.7V
NC working time: 40h
Bluetooth working time: 15-20 hours
Charging time: 1.5 -2 hours
MOQ per customized color 2000pcs
with 30cm black Micro-USB cable