Features: Newest Version, it is with upgraded fan inside Intelligent Maximum Power Point Tracking technology.Built-in DSP controller with high performance Three-stage charging optimizes battery performance Multi-function LCD displays, Overcharge protection Can be mounted , Suitable for battery types of sealed lead acid, vented Gel, and Lithium battery. Protection class is IP21 Can automatically adapt to 12V/24V/36V/48V voltage Energy conversion rate of up to 95% Protection class is IP21 With buttons for easy operation Charging current: 40A size: 21.4 x 11.5 x 5cm Material: ABS+aluminum colour: silver 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.