1200m Full-duplex 4 User Intercom Helmet Waterproof Interphone with Bluetooth Function V4C (Plug: US plug)

1200m Full-duplex 4 User Intercom Helmet Waterproof Interphone with Bluetooth Function V4CDescription: 4 Users talking at the same time1200 Max talking range( 1200m talking range is in vacuum environment)Working speed up to 120km/hExcellent performance for full-face helmet and half-face helmetUp to 8 hours talking time, 500MAH battery, 240 hours standbyAdvanced A2DP & EDR Bluetooth profileWater resistance, all weather, friendly for glovesSupport to Smartphone, mp3 GPS and other audio headsets, with stereo headphoneAutomatic and safe receiving mobile phone callsSpecially Designed for 5 Users with Free Helmet Bluetooth Radio, for The Referee, Cranes, Aerial Division, Concerts Directed, Video Cameraman, Driving,Motorcycle Racing, Cycling, Electric tower Construction, Ski Mountaineering and Other Work Required Full Hand-Free Communication! 1) The Device Can Be Used as a Hands-Free Phone Calls Bluetooth Headset Football Referee In The Match When Law Enforcement, Outdoor Aerial, Cranes, Mountaineering, Skiing, Skateboarding, Hiking, Alice Team, Motorcycle Team Travel Time You Are Safe Using Internal Bluetooth Function Calls. When The Phone is Turned On, You Do Not Need to Press Any Buttons, You Can Ride as Usual, About 5 Seconds Later, The Phone Will Automatically Turn On; of Course It Also Has Refused to Answer The Phone Function. 2) Between The Two, Three, Four Users Bidirectional Full-Duplex Wireless Intercom (Requires a Few People Use It Several Paired Use) The Maximum Communication Distance is Up to 1200m, Usually In The Open Unobstructed Environment Around The Effective Distance of About 600m. Please Note That The Actual Range Will Ultimately Depend On Weather Conditions, Terrain, Presence Obstacles, Namely Large Vehicles Or Invisible Buildings Real Full-Time for One-Way Intercom Can Be Concerned, Because It is Half-Duplex, Only One Person Say That a Person Listening, Speaking and Can Not Achieve The Dual Function of Listening, and Our v4c Like a Regular Phone As Workers Conversation. 3) for Calls Mp3 / Gps If Your MP3 or Gps is No Bluetooth Features and You Have Not a Bluetooth AV Dongle, This Bluetooth Device Also Provides Another Simple Way to Listen to Music In Stereo Wired / Audio Information. It is Directly Connected Through The 3.5mm Audio Plug and Bluetooth Devices. In Order to Achieve The Function of Listening to Stereo Music 4) If You are Traveling too Monotonous, Then It Also Has an FM Function. Specification: Standby Time: 240 HoursContinuous Call (Music Playing ): About 8 HoursCharging Time: 3 HoursWaterproof: YesFm Radio: SupportBluetooth Version : 3.0Chip: CSR BC5Operating voltage: 3.3V-4.2VRadio frequency :( Japan) 76M-108MHZSpeaker power: 0.25WTTS: NoOperating temperature range: -10 to + 45 ? Parcel Included: 1 x V4C Referee Headset1 x Wired Microphone1 x Charger ( 4 kinds of plug for choice)1 x User Manual1 x Charging cable2 x Installation screws1 x Installation screwdriver1 x Armband case