S21 Riding motorcycle helmet headphones Multiple calls

Main features.
Motorcycle helmet wireless bluetooth headset without intercom function
1. Can be connected to a cell phone to realize automatic answer, reject calls, voice calls, play music and other functions.
2. Support Bluetooth to connect 2 cell phones at the same time.
3. EASY TO INSTALL: You can easily install the motorcycle bluetooth headset on most helmets in minutes and switch the microphone according to the helmet, including full helmets, half helmets, open face helmets, 3/4 face helmets, off-road helmets, and retro helmets full helmets, half helmets, 
4.Package:
1.Bluetooth Name: S21

Specification.
Product Parameters:
1.Bluetooth version: V5.0+EDR
2.Frequency range: 2.4026GHz-2.480GHz
3. Transmission distance: 10M (transmission distance varies by environmental factors and mobile Bluetooth devices)
4. Waterproof IP65 5. Support FM radio 6. 40mm high quality speaker with hard and soft microphone
7. Lithium battery: 3.7V/1000mA
8. Charging time: 2-3 hours
9. Standby time: about 380 hours
10.Continuous working time: about 38 hours


Packing list
1* Headset
1* Manual
4* Velcro
1* USB cable