1、Customized iron-silicon-aluminum inductors add protection to the TV input and output, support 12V trolleys and 24V trucks, synchronous rectification, high current output, low heat and high performance. 2、More than 5.6V voltage start protection, to prevent accidental passage, it is safer to protect your phone or tablet from other 5 V rechargeable products. 3、Display: USB port red digital tube shows the top of the output voltage, and the bottom of the blue digital tube shows the output current of the USB port. 4、Use range: support 12V car and 24V truck use, support identification for IPAD 2.4A charging, for Samsung mobile phone charging, tablet charging, mobile power charging, can be converted to driving recorder power interface, car charging interface or deskto 5、Current calibration: start without load, press and hold the button for 6 seconds, the upper and lower digital tube flashes, at the top of the red digital tube display 001, at the bottom of the blue digital tube display 000, then the calibration is succes Features: Customized iron-silicon-aluminum inductors add protection to the TV input and output, support 12V trolleys and 24V trucks, synchronous rectification, high current output, low heat and high performance. More than 5.6V voltage start protection, to prevent accidental passage, it is safer to protect your phone or tablet from other 5 V rechargeable products. Display: USB port red digital tube shows the top of the output voltage, and the bottom of the blue digital tube shows the output current of the USB port. Use range: support 12V car and 24V truck use, support identification for IPAD 2.4A charging, for Samsung mobile phone charging, tablet charging, mobile power charging, can be converted to driving recorder power interface, car charging interface or desktop charger interface. Current calibration: start without load, press and hold the button for 6 seconds, the upper and lower digital tube flashes, at the top of the red digital tube display 001, at the bottom of the blue digital tube display 000, then the calibration is successful, press and hold the button for 6 seconds to exit. Specifications: Material: Acrylic Size: Approx. 8*7.5*2.7cm/3.15*2.95*1.06inch Input: 10V-30V Output: 5.3V/8A Output port 5.5 2.1 female connector compatible with 5.5.5(Wires can be connected directly) Package list: 1 x Power Regulator Module