USB Port,you can use it to charge mobile phone.
Suitable for 12V and 24V battery
2.Car Battery Voltage Monitoring
Simply plug into cigarette socket,
Instant confirmation of battery voltage,
Low power consumption high light display.
Light Color: Red,White,Blue
Output Voltage: 5.0V
Maximum Output Current: 2.1A
Total Length: 7.6cm/3"(approx)
1 x LED Digital USB Charger Thermometer Voltmeter
you can track your packages after an order has shipped.