1pcs Football Referee Intercom Headset V4C 1200M Full Duplex Bluetooth Headphones with FM Wireless Football Intercom Weclomed Every Wholesale!!This headset is specially designed for football and handball referees.Referees wear a single-ear headset to get game information real-time, this headset supports them freely, but also hears clear sound even when the environment is noisy. This set includes referee headset and Vnetphone V4 intercom, the headset works very well with intercom. Referees can hear the sound clearly even when surrouding is loud, V4 helps referee to talk within 1200m range, perfect for soccer field. Note: 2 kinds of microphone optional, that is, spiral-shaped microphone and rectangular-shaped microphone, please provide your favorite microphone, leaving a message or adding an order note when you place the order, otherwise, we will send any microphone randomly. V4C/V4C PLUS is a professional communication tools designed for referees, it works well for soccer referees, soccer referees, handball referees etc. Perfect for group a 3-people team communication. This referee headset saves money for you, much more affordable than 3pcs V4C/V4C PLUS, but suppoer 3 people talk at the same time. With this headset, two referees can talk without difficulty within 1200m range . Even when they move fast, they can hear super clear. Moreover, we also send an armband to put the intercom headset, thus, referees can wear the armband and use the headset much easier. V4C PLUS parameters: Number of intercoms : 3 people Bluetooth version: 5.1FM function: yes Voice prompt operation: yes Adaptable bracket: EUC (optional accessories) Intercom distance: 1500 meters (4 sets of distance) Charger interface: 3.5mm round hole Waterproof grades: IP65 Charger specifications: DC5V/1A (without charger) Working voltage: 3.7V Battery capacity: 750mAh Charging time: 2H Standby time: 150H Intercom time: 18H Music time: 24H Mobile phone connection distance: 10M Working temperature: -10 deg; ~50deg; cMain video is V4C paired video, below is V4C PLUS paired video. V4C Features: Three-way real-time referee, three people talking at the same time Maximum talking range: 1200m/3937ft between 3 people Maximum operating speed: up to 120Km/h Talking time : up to 8 hours Standby time: 100 hours Frequency: 2.4GHz Bluetooth core: Bluetooth 3.0 Battery: 850MAh polymer lithium battery Charging time: about 3 hours Chip brand: CS R Power supply: AC 110V ~ 240 V Output power: DC 5V 55 ~ 75 m A Package includes: 1 x V4C /V4C intercom plus bluetooth 1 x headset 1 x armband bag 1 x USB cable 1 x user manual Note please: 1 pc. V4C PLUS or 1pcs V4C will send any of them as random. 100% orignal please don't worry. However, due to the difference between old and new versions, it is not recommended to use V4C PLUS and V4C after pairing at the same time.