Waterproof Bluetooth Intercom Interphone with FM Radio for 4 Motorcycle Riders Full Duplex Talking

Main function:
Up to 4 people at the same time full duplex real-time intercom.
No hotkey, easy to use.
Memory matching, simple and easy to use.
With FM radio function.
Using the United States the latest research and development of dual Bluetooth 4 chip, HD quality.
High power headphones, can be used in busy occasions.
Adopt 6 grade waterproof standard.
Audio input
Latest Bluetooth technology, low power, up to 15 hours of talk time
240 hours long standby
Real environmental protection without radiation
Separate charging interface, can be used for edge charging!!
Can be paired with the ordinary Bluetooth headset, and front and rear seat in the intercom intercom

Bluetooth version: dual Bluetooth 4
Chip: BC5 CSR
Battery capacity: 550mah
Battery type: polymer
Charge and discharge times: 500 times
Working voltage: 3.3V-4.2V
Talk time: 15 hours
Standby time: 240H
Charging time: 2.5H
Radio frequency band: no
RDS: Yes
Speaker power: 0.25W
Waterproof grade: 6
Automatic volume control: no
Operating temperature range: -10 to +45℃ (minimum and maximum operating temperature)
Charger specifications: USB

Intercom: full duplex communication
FM radio: optional (support)
Mobile phone automatic answer: support
Bluetooth password: 0000
Features: waterproof, special helmet Bluetooth intercom headset