The SENA SF4-01 Motorcycle Bluetooth Communication System is the perfect choice for small group communication.Talk Time of up to 13 hoursBluetooth 4.1 - Headset Profile (HSP) and Hands-Free Profile (HFP)Advanced Audio Distribution Profile (A2DP) and Audio Video Remote Control Profile (AVRCP)Working distance: up to 1.2 km (0.8 miles) in open terrainAdvanced Noise Control with built-in SBC Codec and wide volume controlBuilt-in FM radio with RDS AF (Radio Data System Alternate Frequencies)10 pre-set station memory with automatic scan function1.5 hours charging time of Lithium Polymer BatteryQuick Charge: 30 minutes of charging equals 4 hours intercomElectronics: CE, FCC, IC certificationThe SENA SF4-01 Motorcycle Bluetooth Communication System is the perfect device for riding with friends by providing connectivity for small groups. The SF4's 4-way intercom has a range over 1.2 kilometres (.80 miles) so you can easily stay connected with your group in open terrain. This is achieved using B