bluetooth earphone
1.V4.1 Sports Bluetooth Earphone              2.Volume Control and earbud housing with Rubber Coating         3. Fabric cable           4. Acessories : three sets earbuds

Earphone:
Bluetooth version: bluetooth V4.1+EDR
Support: HFPV1.5, A2DPV1.2, AVRCPV1.4, HSP1.2, GAVDP1.2, IOP
SNR: 96dB SNR stereo ADC and stereo DAC
Sensitivity: -80dBm<0.1%BER
Working distance: 10m
Working frequency: 2.4 - 2.480GHZ
Transmission power: CLASS2, 4dbm
Audio S/N: ≥85dB
Audio performance: SBC decoding
Battery: 3.7V/80mAH built-in rechargeable Li-on battery
Charging voltage: DC5V
Charging time: about 2 hours
Working currency: ≤20mA
Standby currency: <2mA
Working temperature: -40℃ to +85℃
Play time: about 4 hours
Talk time: about 5 hours
Standby time: about 40 hours