V6C New Full Duplex 1200M Arbitration Football Referee Earhook Bluetooth Intercom Monaural Earphone Headset -- V6C New Full Duplex 1200M Arbitration Football Referee Earhook Intercom Bluetooth Monaural Headphones Headphones According to the communication with some buyers, they used this device to pair with V4C or V4 pro for intercom, we hereby clarify that this intercom device is not compatible with V4C or V4 pro device , please kindly note before purchasing. This headset is specially designed for football and handball referees. Referees wear a single-ear headset to get real-time game information, this headset supports them freely, but also hears clear sound , even when the environment is noisy. This set includes referee headset and V6 intercom, the headset works very well with intercom. Referees hear the sound clearly even when the surrouding is loud, V6 helps the referee talk within a range of 1200m, perfect for soccer field. Features: Between two players among six players Maximum talking range: 1200m/3937ft between 2 players Maximum operating speed: up to 120 Km/h Talk time: up to 8 hours Standby time: 100 hours Frequency: 2.4GHz Bluetooth core: Bluetooth 3.0 Battery: 550 mAh lithium polymer battery Charging time: about 3 hours Chip brand: CSRS Power supply: AC 110V ~ 240 V Output power: DC 5V 55 ~ 75 mAHighest features: Bluetooth motorcycle helmet intercom with talk range up to 1200 meters Full duplex wireless Bluetooth handsfree intercom Up to a pair of 6 riders and talk between any 2 of them at a time with DSP wind noise cancellation, hear clearly at speeds up to 120 km/h High quality batteries, 3 hours charge to full and Up to 8 hours of talk time with Bluetooth stereo headset, supports Stereo Music/Navigation Audio with GPS, Auto answer the call. Ultrasonic integral molding, better waterproof, can be used in all weather. Wireless communication. You can pair with other 5 people. Motorcycle helmet suit (full face/half face) Works well with referee headset for soccer match (3-4 pcs to make a group of referees) Package includes: 1 x V6C Bluetooth intercom 1 x set Headphone 1 x Armband Bag 1 x USB Cable 1 x User Manual Note: 2 kinds of microphone optional, that is, spiral-shaped microphone and rectangular-shaped microphone, please specify your favorite microphone by leaving a message or adding a comment when you place the order, otherwise, we will send randomly. Package Includes: 1 x V6C Bluetooth Intercom 1 x Headset 1 x Armband Bag 1 x USB Cable 1 x User Manual