Operating voltage: 12-24VVoltage limit: 9-26VBluetooth version: 2.1 + EDRBluetooth voice out: A2DPBluetooth transmission distance: 10MFM Frequency: 87.5-108MhzPlayback Formats: MP3 / WMAOutput: 5V /2.1ABuilt-in stereo FM transmitterFM transmitter range: 87.5 to 108.0MHz,total 206 channelsDisplay and store channels volume and track information of songs. and comfortableLine-in connector for audio playersPlays music stored on compatible Bluetooth stereo devicesOne key to answer/reject/pair mobile phoneAuto-play music after call ends