Feature: 1. Easy Adjusting: The adjusting knob can be used to adjust MPPT voltage, output voltage and limiting on the output current, very easy. 2. Stable Working: Excellent heat dissipation ensures stable working performance under high power, and very efficient and reliable. 3. Better Display: Supports real time control on the MPPT regulating voltage, the boost buck converter is very simple for operation. 4. Practical Uses: Allows for extensive application on solar charging, lithium battery charging, regulated power supply and so on. 5. Easy to Install: Designed to have a compact size and a light weight as well, the installation is very simple to finish in minutes. Specification: Item Type: Buck Boost Converter Output Current Regulation Range: 0-20A Current Display Range: 0.00A-20.00A (accuracy ± 0.03A) MPPT Function: Yes Anti Backflow Function: Yes, there is no need to string diodes to connect the battery. Constant Current and Current Limiting: Yes Overpower Protection: 300W, over power will turn off the output and display OPP. Product Size: Approx. 108 x 64 x 48mm / 4.25 x 2.52 x 1.89in Application: For solar charging, lithium battery charging, LED constant current drive, regulated power supply. . Package List: 1 x Buck Boost Converter