Water resistance Max 3 rider intercommunication Bluetooth version:3.0+EDR; Frequency: 2.4GHz; Supports: A2DP and AVRCP; Supported bluetooth profiles:Bluetooth headset and hands free profiles with automatic detection; Operating range:Up to 10m for cellphones; Battery type:Rechargeable lithium polymer 450mAh; Stand by:Up to 300hrs; Talk time:Phone up to 8 hours; Intercom:Up to 6 hours; Charging Time:3 hours; Power adaptor: DC 5V 500mah Bluetooth version: 3.0+EDR Bluetooth intercom for 2-3 riders. 3 riders pairing and 2 riders intercom at same time. Support up to 120km/h (75mph). 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 8 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 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 Audio cable to connect MP3, GPS, walkie-talkie and so on Working temperature: -30 - 70 Deg.C Brand No Brand SKU 100231499_NP-1020490538