2-Way Intercom Communication, Max 6 Referees to Connect V6C referee bluetooth intercom supports up to 6 people pairing, 1 host machine controls 5 sub-devices for 2 people real-time intercom. The talking distance can reach 1200m and it is suitable for most competition referees. Bluetooth Version 5.1 Steady data transmission and premium performance. The advanced Qualcomm Bluetooth chip with optimized Bluetooth version 5.1 dramatically increase the transmission rate and while keep the low-energy consumption. Longer Battery Life With rechargeable Li-polymer 850mAh battery, V6C referee bluetooth intercom provides you about 18-hours talk time and 25-hours music playing time. It only takes 3h to fully charge and standby time can up to 260h. Waterproof IP65 High-degree waterproof and dust-proof, freely use in most types of weather. If it happens to rain at the competition site, EJEAS V6C can still be used normally without affecting the communication between the referees. Compatible with mobile phones/GPS/MP3 V6C is compatible with most bluetooth enabled devices such as smartphone, MP3, GPS. It also has voice control function like Siri voice commands. No need to bring out your iPhone, and talk directly to the microphone to awaken your voice assistant, like Hey, Siri. Can be used in most scenarios EJEAS V6C referee communication system has wide applications. It can be used for competition referees, mountain Climbing, driving school coaches, venue scheduling, construction sites, and other outdoor activities. Package Content One Pack: 1x V6C intercom; 1x referee headset; 1x USB charging cable; 1x running armand; 1x using manual Dual Pack: 2x V6C intercom; 2x referee headset; 2x USB charging cable; 2x running armand; 1x using manual