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Product parameters
Product Name: HOPESTAR-S11
Wireless connection name: HOPESTAR-S11
Wireless version: 5.0
Transmission distance: 10m
Power Input: DC 5V
Headset Battery capacity: 3.7V/ 50mAh
Call/ play time: about 4 hours
Charging time: about 60 minutes 
Charge box battery capacity: 3.7V/ 300 mAh
Support agreement: HSP / HFP /A2DP / AVRCP
Sensitivity: 120 士 5dB
Frequency response range: 20-20000Hz
Impedance: 16Ω
Playing time is based on battery capacity & power consumption and may different from actual use.