... Digital Sound Process) Technology which be installed on car windshield and sun visor 2.built-in FM transmitter,speaker 3.CSR bluetooth ... English,French,German,Spanish,Russian,Portuguese,Italian Specification Bluetooth:Version 2.0+EDR Music format:MP3 FM transmission type:FHSS FM ... Music play time:20hours Battery:Built-in rechargeable Li-ion Car power voltage range:12-24V Solar Panel Bluetooth Car Kits