... is resonant and distinctSpecification:. Bluetooth: Version2.1+EDR. Working distance range: 10meters.. Battery: Built-in rechargeable Li ... 5V. Standby current: 350uA. Working current: 80mA. Car charger rated input voltage: 12V. Car charger limited input voltage: 8V~ ... Projectors, Tablet PCs (MID), E-Books, Car DVRs (Car Blackbox), Bluetooth Car Kits, Car FM Transmitters, Mini MP3 Speakers, Digital Photo ...