Check the listing for details. 2 Set Full Duplex Sccocer Bluetooth Referee Intercom Headset Earpiece for 2 User. Color: Black, Condition: New. Listed at 113.99 USD. Description: 1. Full duplex intercom among 2 referees same time and total can connect 6 referees, 1 host switching to other 5 2. Plastic + Rubber button, more stable structure, better waterproof performance. This system is fully weather protected. 3. V6C bluetooth intercom come standard with Bluetooth 3.0 technology which allows referees to wirelessly make mobile calls, listen to stereo or MP3 player music 4. Up to 8 hours talking time. Up to 240 hours standby time 5. Certification CE,FCC,ROHS,BQB 6. Full weather protection. Waterproof standard IP65 6.The dialogue function requires one intercom per person, support for 2 referees in real-time intercom or intercom for 6 persons (one for the host to connect the remaining 5). Purchase Guide: If you need 2 referees talking at the same time, please order 2 unit V6C. If you want to achieve 3 referees talking at the same time, please order 1 unit V4C and 2 V6C. If you need 4 referees talking at the same time, please order 4 unit FBIM or V4C. Note: Use Power requirements:5V 1A AFTER-SALES SERVICE:Intercom accessories will be replaced free of charge within 6 months, and EJEAS V6C will be replaced free of charge within 12 months. Package Include: 2 * intercom 2* headset 2 * USB charger cable 2 * User manual 2 * armband