Features:(1).V5.0 Bluetooth, DSP processing, super CVC noise reduction, super low consumption, fast pairing, super long working and standby time;(2).It can answer, reject and up calls within a visible range of 10 meters, and support the connection of 2 mobile phones;(3).40mm tuning speaker diaphragm, shocking music;(4).In the open visual range, a full-duplex intercom with a distance of up to 800 meters between two Bluetooth walkie-talkies. After the intercom is enabled, the mobile phone is still in the standby state to that no calls are missed;(5).It can realize any switch between mobile phone call, intercom, stereo music and FM radio;(6).You will be able to connect with other brand products via Bluetooth, and have a smooth intercom.(7). Support voice communication at a speed of 120 km/h;(8).The waterproof and -proof design of the whole machine is durable, and the waterproof grade reaches IP65.Specification:Working distance: 800 metersWorking frequency: 2.4GHzBluetooth version: Bluetooth 5.0Support Bluetooth protocol: A2DP and AVRCPSupport Bluetooth function: Bluetooth headset with automatic detection function and hands-free profile.Battery type: 600mAh rechargeable lithium polymerStandby time: up to 300 hoursTalk time: up to 18 hours for mobile phone talk/listen to music; up to 15 hours for intercom.Charging time: about 2 hoursCharging interface: TYPE-C interfaceColour:blackMaterial:ABS+Electronic componentstype: APackage Contents:2 x Bluetooth Host2 x Integrated full helmet microphone speaker2 x Base2 x Charging cable1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.