FBIM 4set Football Referee Full Duplex Bluetooth Interphone 1200M Synchronous Intercom Paired Wireless FM
Up to 12 hours or more, 850 mAh large battery
4 people Full duplex Referee intercom; Up to 1.2 km talking distance
IPX 5 level waterproof standard,full weather protection
With high-tech CSR BC5 chip to do the leader, adding Bluetooth 3.0 professional chip. Support high-end NFC matching phone, and FM radio function.
Suitable for soccer games, skiing, motorcycles, concerts, camping and so on.