A charger with a Bluetooth transmitter. Allows you to charge the smartphone's battery and play your favorite music. The charger is lightweight and takes up little space, so you can easily fit it in a glove box. Specification: Bluetooth version: Bluetooth V4.2 JL Size: 90 * 35 * 35 mm Weight: 38 g FF frequency: 87.5-108 MHZ Input voltage: 12V - 24V USB output voltage: 5V / 2.4A Playback formats: MP3, WMA