1、High frequency low impedance electrolytic capacitor, high voltage resistance, high stability. 2、Fully welded by machine with great quality and durability. 3、With double the printed circuit board, increase the line width of the board to ensure smoother current flow 4、Four USB port to reserve voltage divider resistors for your DIY. 5、All 5V devices, less than 25W electrical devices, etc. for MP3, MP4, MP5, mobile phones, pads, GPS, Bluetooth devices and car data loggers can be used at the same time or can use LED power. Features: High frequency low impedance electrolytic capacitor, high voltage resistance, high stability. Fully welded by machine with great quality and durability. With double the printed circuit board, increase the line width of the board to ensure smoother current flow Four USB port to reserve voltage divider resistors for your DIY. All 5V devices, less than 25W electrical devices, etc. for MP3, MP4, MP5, mobile phones, pads, GPS, Bluetooth devices and car data loggers can be used at the same time or can use LED power.   Specification: Input:9~40V Output:5V Current:5A Maximum Current:8A Size: 4.8 x 3.8 x 2.2cm / 1.89 x 1.5 x 0.87in Package List: 1 x Module Note: When the positioning holes are used, since the upper side and the lower side of the printed circuit board are different, the copper sheets are prevented from causing a short circuit together. Unstable voltage on the vehicle, a wide input must be used to ensure your electrical safety. Must be at 9 to 40 volts input and can be used in car.