The SENA SMH5 MultiCom Motorcycle Bluetooth Communication System has been designed to offer crystal clear communication in noise settings such as Motorcycle Training rides.7 hours talk time, 7 days Stand-by timeBluetooth 3.0 with Headset Profile (HSP) and Hands-Free Profile (HFP)Advanced Audio Distribution Profile (A2DP)Audio Video Remote Control Profile (AVRCP)Working distance: up to 700 meters (760 yards) in open terrainAdvanced Noise Control with Wind noise reductionBuilt-in SBC CodecWide volume controlBuilt-in FM radio with RDS AF (Radio Data System Alternate Frequencies)10 pre-set station memory with automatic scan functionCharging time: 2.5 hoursLithium polymer BatteryCE, FCC and IC certificationThe SENA SMH5 MultiCom Motorcycle Bluetooth Communication System was designed to easily snap on and off of user s helmets. The Quick Clamp allows the unit to be quickly and effortlessly installed and then transferred between helmets ideal for motorcycle training courses, tours or rental