This is the "resistor replacement box", a low cost alternative solution, you can set flexible and fast resistor between 1R and 9999999R, 1R step precision. For educational experiments, electronic engineering design or test clipping are great applications. Design based on the resistor series theorem. 1/2 watt tolerance +/- 1% SMD resistors. High quality FR4 fiberglass PCB. Maximum operating voltage: 200V Resistor Board size: 90 x 35 x 10mm Empty current: typical 25mA Voltage regulation: 0.5% Dynamic reaction velocity: 5% 200uS Short-circuit protection: None (Fuses and protection circuits must be installed at the input port.) Reverse polarity protection: None (please use a standard diode on the output port.) Input voltage: 10-32V Output voltage: 12-35V (adjustable) Output current: 10A (MAX) Current input: 16A (MAX) (Please increase heat dissipation if more than 10A) Output power: 100W natural cooling (MAX), improve heat dissipation 150W (MAX) of the module: not isolated step-up module (boost) colour: Red + green Material: Copper Clad Laminate + PCB The boost converter size:65 x 56.5 x 23mm Package Contents: 1 x 150W The boost converter 1 x Resistor Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 2 Pcs Electronic Accessories: 1 x 150W The boost converter & 1 x Resistor Board 1. Easy to drive 65W 90W dual-core notebook. 2. Use 12V 19V battery 3.42A notebook, the module temperature over 45c. 3. Conversion efficiency: 94% (measured at 16V input, output 19V 2.5A) 4. Ripple Output: 2% (MAX) 20M-bandwidth. Operating temperature: Industrial (-40 Celsius to + 85 Celsius) (environmental temperature exceeds 40 Celsius, use of lower power, or increase heat dissipation)