S11 Riding motorcycle helmet headphones Multiple calls

Main features.
Motorcycle helmet wireless bluetooth headset without intercom function
-Using the latest bluetooth wireless technology to connect to your cell phone;.
-Fashionable design, enjoy wireless music anytime and anywhere;.
. Hands-free communication function, really release hands, realize safe riding;.
-Built-in 200mA rechargeable lithium-ion battery to ensure standby and working time; .
-5.0 Bluetooth chip, real high-fidelity sound effect; .
-DIY design, can be disassembled at will;.
Support function:
1: FM (receive channels automatically)
2: telephone, voice
3: telephone automatically answer (key to hang up the phone)
4: Bluetooth connection transmission distance of 10 meters
5: Compatible with all cell phone Bluetooth
6: Charging while listening to songs, voice

Product Parameters:
Bluetooth pairing name: S11
Chip: Jelly
Charging port: Type-C
Bluetooth:5.0
Frequency:2.402GHz-2.480GHz
Range:20-30 meters(depends on device surroundings such as obstacles)
Microphone transmission distance:1 meter
Polymer Battery:3.7V/200mAh 
Charging Voltage:5V
Working life 8-10 hours
Standby 120 hours
Charging: 2 hours
CVC noise reduction


Packing list
1*Headphone
1*USB charging cable
1* User manual
4* Velcro for earbuds