This Bluetooth intercom is compact and convenient. Have fun in a more fun life. Answering automatically, listen to stereo music and use it easily, you can also protect it safely. Specification: Maximum number of speakers: 6 Special function: noise reduction, waterproof Talk time: up to 8 hours Working speed: up to 120 km/h. Maximum communication distance: >1000m Connection mode: Bluetooth Maximum support: 6 people Maximum range: 1200 m. Stereo music/audio: A2DP / MP3 / GPS phone support. Frequency: 2.4 GHz Intercom: Motorcycle Bluetooth Intercom Waterproof: IP65. HD Call Package contents: 1 x Bluetooth intercom. 1 x helmet. 1 x USB cable. 1 x instruction manual. 1 x screwdriver. 2 x screws. 2 x cotton sticks. 1 x pliers.