Wireless sports running headphones

Bluetooth wireless connection
Bluetooth HFP/A2DP/ HSP/AVRCP

Communication distance 10 meters ("open environment")
Two headphones for four hours
The standby time of helmet is about 150 hours.
40mAh battery capacity of single ear
Charge box battery capacity 300mAh
The loading time of helmet is about 1.5 hours.
The loading time of the loading box is about 2 hours.
Load box size 62 × 40 × 27.2mm
Helmet size 26.65 × 16.4 × 21.6mm