Imput Port:Bluetooth wireless&3.5mm in-line

Bluetooth Specification:Bluetooth V5.0 

Transmission Distance:>10m 

Working Voltage:3.7V 

Noise Reduction Type:One-way feedback

Noise Reduction Depth:18~20dB 

battery copacity:400mAh 

MAX Working Time:40h 

Bluetooth Working Time:15h 

Charging hours:1.5h 

Unit Diameter:40mm 

Impedance：32Ω

Frequency:20~20KHz 

Speaker Sensitivity:105dB 

Microphone Sensitivity:-40dB 

Wire Length:1.2m

Product Weight:350g 

Packing Size:20.5*14*8.5cm

Package: 20PCS/CTN

N.W:7.40KGS

G.W.:8.10KGS

MEAS:47*40*39CM