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BH21 Bluetooth Headphone

Speaker:40mm
Sensitive:110±5 db
Impedance: 32±5% Ω
Frequency Respond:20HZ~20KHZ
Battery: 200mA
Playing time :4-5 hours
Talking time :4-5 hours
Chipset : JL V4.2
Signal Distance :10M
Function:FM ,TF,Bluetooth
Headphone shell:ABS+metal wiredrawing craft
Data Interface :USB 2.0 with 3.5mm audio cable
Functions: Calling /End call/Refusing /Volume Control/Music Previous/Next/ Pause/Start/FM ,TF Support