Descripiton: The Inter Phone is a Bluetooth Headset designed for the motorcycle rider & passenger who wish to have clear & reliable wireless communications while riding This headset is compatible with Bluetooth cellular phones & can be suited to any sort of helmet for motorcyclists Wireless headset for bluetooth enable cell phone at a range of up to 10 meters. Bike-to-bike intercom for rider& passenger or two separate bikes up to 800-1000 meters. Up to 10 hours talk time when connected to cell phone.. Up to 6 hours talk time when using the intercom feature.. Up to 300 hours standby Call out, call answer, call reject, call hang up Receive a cell phone call automatically Support audio transfer Support the last number redialing FM Radio function Enjoy the cell phone music through A2DP or connect GPS Control cell phone music through AVRCP: forward, backward, play, pause Automatic switching among bluetooth cell phone, intercom, stereo music With DSP echo cancellation & noise suppression technology, crystal clear voice quality is guaranteed in a high speed Button panel is water-proof & sun-proof, while the design is durable. Audio cable to connect MP3, GPS, walkie-talkie & so on The main feture of this intercom is that it could be a intercom for Wired Helmet (With a belt to fasten) and Wireless Helmet Specification: Bluetooth Version: 3.0+EDR Frequency: 2.4 G Hz Supports: A2DP & AVRCP Supported Bluetooth P