Professional referee intercom: With the optimised Qualcomm Bluetooth 5.1 chip, the EJEAS V6C can achieve fast pairing and maintain low energy consumption. It supports the pairing of up to 6 people, the real-time intercom for 2 people and the conversation range can reach 800 m Noise reduction technology: The V6C referee communication system uses advanced DSP noise reduction technology to eliminate the echo and ambient noise of the call, so you can enjoy a more stable and crystal clear sound while driving Long battery life: the V6C has an 850 mAh battery that can be fully charged in just three hours and offers up to 260 hours standby time, 18 hours intercom use and 25 hours of music playback. It is easy to use, with user-friendly controls and hassle-free setup, making it the perfect communication tool for referees and professionals Waterproof and versatile: With its waterproof IP65 rating, the Bluetooth headset for trainers can withstand different weather conditions, making it an ideal choice for outdoor sports events. It is the perfect wireless intercom system for referees in sports such as football, basketball, golf and more. In addition, it is also highly recommended for training, construction sites, event planning, security and other applications