Features: This product waterproof level up to three-level. It can be used when Water droplets fall on it Maximum talking range 1000 meters between two riders. Works as bluetooth hands-free for cell phone at range of up to 10 meters Wireless communication between three riders by Bluetooth system. Suited to any sort of helmet for motorcyclists. Up to 5 hours talking time,Up to 300 hours standby. Safe auto-receiving cell phone calls. If do not want to answer, reject and hang up with one button. Support last number dial Listen music/audio wirelessly through A2DP from bluetooth music device,or connect GPS Control cell phone music through AVRCP: forward, backward, play, pause. Support FM Radio Freely switch between bluetooth cell phone, bluetooth intercom, stereo music With digital signal processor echo cancellation and noise suppression technology, crystal clear voice quality is guaranteed in a high speed. Button panel is water-proof and sun-proof, while the design is durable. Easy installation. Modern black, decent design. Ideal for motorcycle and skiing helmet Package Including: 1 x BT-S2 Bluetooth Headset 1 x US/EU travel charger(According to your choice) 1 x Headset clip w/Fastening Screws 1 x Screw driver 1 x USB Cable 1 x Audio Cable 1 x pad 1 x English User Manual 1 x Earpiece