Bluetooth version: V5.0
Working frequency: 2.402-2.480GHz
Bluetooth Profiles: HSP/HFP/A2DP/AVRCP Transmission
Distance: 10m
Power level:Class 2
MIC:-42±3dB
Charging input standard:Touch spot，DC 5V/0.5A
lithium battery: 35mAh*2
Charging time: About 1.5hours
Working time: About 3-4 hours
Standby time: About 60 hours
Charging box performance parameters
Input standard: DC 5V/0.5-1A
Output standard:Touch spot，DC 5V/0.5A
Charging standard:Micro-USB，DC 5V/0.5-1A
lithium battery：250mAh
Charging time: About 1-2hrs
Standby time: About 250 hrs
Charging box charging time:About 2-3 timeslithium battery?