QuasarBeam USB Car Charger Black White Led Display 4 in 1 Battery Thermo Reader Black 2 output 12V/24V Car Voltage Temp Meter US (Black) Dual USB Charging Ports Detects your device to deliver its fastest possible charge speed Super LED DISPLAY SPECIFICATIONS - Input: DC 12V - 24V; Output: DC 5V/3.1A Just Plug-In your Cigarette input Charging will be automatically stop when battery is full Measuring range: Voltage 5V-25V; Current 0 - 3.1A; Temperature -20 to 80 C