Maximum Number of Speakers : 4 Maximum Intercom Distance : 500-1000m Certification : CE Origin : Mainl China Item Type : Helmet Headset Item Weight : 0.4kg External Testing Certification : ce Applicable Helmet Type : Universal Special Function : voice control,Universal Pairing Function,waterproof,Noise Reduction Model Name : V6C Power Supply Mode : Built-in Battery Connection Mode : bluetooth Bluetooth referee intercom headsets withu00A0talking range up tou00A01200 metersFull Duplex Wireless Bluetooth Hsfree intercom commnunicateUp to Pair 4 people Talk Between Any of them at a timeV4C:FM Radio, never be boring at the part time.WithWind noise DSP cancellation,u00A0you could hear clearly at a speedu00A0up to 120km/h batteries,u00A03 hours charge to full u00A0Up to 8u00A0hours talking timeWithu00A0Stereo Bluetooth Headset,u00A0supportsstereo music or Audio navigation from GPS,u00A0Auto answeru00A0theu00A0call.Ultrasonic integral molding,u00A0Better water resistance,u00A0could be used inu00A0all weather.Hs free communication.u00A0you can pair with other 3 persons.Suit for motorcycle helmet (Full-face or Half-face)Works good with referee headset for football matchReal time three-way referee intercoms, three people talk at the same timeMax talking range: 1200m or 3937feet between 2 peopleMax working speed: Up to 120km/hTalking time: Up to 8 hoursStby time: 100 hoursFrequency: 2.4GHzBluetooth Core: Bluetooth 3.0Battery:850mAh Li Polymer batteryCharging time: About 3 hoursChip br: CSRPower supply: AC 110V 240VPower output: DC 5V 55 75mA Features:What's more, we also send an armb to put the intercom headset, thus, referees could wear the arm b use the headset much more easier.With this headset, two referees could talk without difficulties in the range of 1200m. Even when they are moving around rapidly, they could hear super clear.This referee headset kit saves money for you, much more affordable than 4pcs V4C, but suppoer 4 people talk at the same time.Perfect to group a 4-people communication team.Xinowyu00A0V4Cu00A0are professional communication tools designed for referees, they work good for soccer referees, football referees, hball referees etc. Package Include: 3 V4C Referee intercoms 3 Microphone headsets 3 USB charging cables 3 User manuals 1 bag