1. Brand new and high quality. 2. 3 in 1 functions: USB charger + car thermometer + battery voltage. 3. Suitable for 12V and 24V battery. 4. Voltage and temperature display automatically changed. 5. Output voltage: 5V. 6. Maximum output current: 2.1A. 7. Digital Thermometer: -10~80C temperature measurement. 8. Digital Voltmeter: Simply plug into cigarette socket, instant confirmation of battery voltage. 9. Car Mounted Charger: Can charge for phone, digital camera, iPad. 10. Low power consumption high light display. 11. Size: 7.5*4*4cm 12. Weight: 28g