Iwoo Wireless Bluetooth OEM Universal Stereo Headset Headphone Neckband Earbud , Red

Charging voltage: DC5V 150mAh
Working current: 25-35mA
Bluetooth A2DP Working range: 10m
Output power: 35mW
Frequency range: 2.401-2.480GHz
Distortion factor: ≤1%
Frequency response: 20Hz-20KHz
Working Time: Music/ HuaTong state 10 h
SNR: S/N≥95 Charging Time: 1h-2h Talk time: 8-15 hours, play time: 6-10 hours
Music Playing Time: up to 10 hours Frequency Response: 20 ~ 20000Hz
Sensitivity: 80dB
Impedance: 32 ohms
peaker Power: 2 x 18mW
Weight: 118g