BT-308 Bluetooth V2.1 + EDR Car MP3 FM Modulator with Car Charger USB Interface Main Features:Support SD card, enjoy your favorite musicSupport USB flash diskPlug it into cigarette lighter of your carVoltage: 12 - 24VFrequency response: 20Hz - 15KHz Specification: Specification Model BT-308 Bluetooth version V2.1 + EDR Operation distance 10M Features Durable, Portable Color Black Dimension and Weight Product weight 37 g Package weight 0.150 kg Product size (L x W x H) 11 x 6 x 6 cm / 4.3 x 2.3 x 2.3 inches Package size (L x W x H) 21 x 11 x 6 cm Package contents Package contents 1 x Bluetooth MP3 Modulator, 1 x Audio Cable, 1 x User Manual