Brand : Deep Bass

Pairing name : TWS-X3

Version : V5.3

Communication distance : 10M 

Software support protocol : A2DP/AVRCP/HSP/HFP

Battery type : polymer lithium battery 

Headphone built-in battery : 30mAh*2

standby time about : 240 hours

Call time (volume 80%): about 4 hours 

Listen to the song (volume 80%): about 4 hours

Charge time : about 1.5 hours

Built-in battery in the charging box : 250mAh 

Battery input voltage : DC 3.7-4.2V

Charging input voltage : DC 5V+/-0.25V

Loudspeaker Size : 13mm

Impedance : 32±ohm

Sensitivity : 112±3dB

Rated input power : 2mW

Frequency response : 50Hz - 20KHz