Professional solar charging Lithium battery charging LED constant current driver Trace point voltage visual adjustment Regulated power supply Input voltage range: range DC7-80V Output voltage range: DC1.4-79 V voltage display range: 1.40-80.00V (accuracy +0.1V or so) Output current adjustment range: 0-20A Current display range: 0.00A-20.00A (accuracy +0.03A or so) Adjustment knob: MPPT voltage adjustment, output voltage adjustment, output current limit adjustment MPPT function: yes Anti-backflow: Yes, no need to string diodes to connect to the battery Constant current (current limiting): yes Over-power protection: 300W, the output be turned off if the power is exceeded, and OPP be displayed Model Number: Digital LCD Display Automatic Step up down Model Number: Automatic Step up down module Type: Voltage Regulator Type: Buck Boost Converter Product weight: 388g without display color:Black Material:PCB size:108 x 64 x 48mm Package Contents: 2 x Buck Boost Converter Only the above package content, other products are not included. Note: Light reflection 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.