Made of Material with high heat dissipation capacity Can automatically adapt to 12V/24V voltage With buttons for easy operation Energy conversion rate of up to 95% Protection class is IP21 Function: Working efficiency up to 95%, temperature rise not more than 75 degrees, real MPPT controller. LCD LCD color display, discharge current display Light control, time control. Can charge lithium and lead-acid batteries. ampere20A size: 13 x 13 x 5.8cm Material: ABS+aluminum colour: black Package Contents: 1 x Solar Controller 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.