Description: Input voltage?DC 3-35V(Note: when the input voltage is less than 4V, voltmeter failure) Input current?9A(max) Output voltage range?DC 3.5-35V(please to ensure that output voltage is equal or above on input voltage) Output current: 6A (max) Output power: 75W (when the input and output voltages are more than 20V, can up to 128W) Conversion efficiency: 96.7% (max) Output ripple: 24mV(TYP) Voltmeter range: 4 to 40V, error ±0.1V Short circuit protection: yes (limit current 14A). Input reverse polarity protection: None (if required, high current diode in series with the input) L x W x H = 67 x 43 x 12mm Note: When connected to high-power load, it will have current-limiting and self-locking protection because of large impact current, it is recommended that to turning on the power first and then access the load. Specification: Application: 1. DIY a regulated power supply, input 5V can output 5-35V adjustable. 2. Power supply for your electronic equipment. For example, 3.7V lithium boost to 5V for mobile power; 7.4V or 12V battery pack boost to 19V for laptop power supply. 3. As the vehicle power supply for your laptop, PDA or a variety of digital products supply. Package Includes: 1 Piece Voltage Step Up Module 4 Pieces Screws 4 Pieces Nuts 1 Piece Heatsink Bar