Product name: DC step-down module Converter Voltage regulating mode: PWM modulation Input voltage: DC4-40V Output voltage: DC1.25-36V Max output current: 8A (more than 5A for long time use,need Fan if over 5A) Max power: 200W Conversion efficiency: 94% Switching frequency: 180KHZ Dimensions: 61*41*27mm Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection When reach maximum output current 8A, need to add fan. Long term work recommended about 5A Panel Mounting: 1. Drill holes in the Panel 7mm 2. Extended potentiometer handle 3. Lock screw sleeve upper knob