1.LED displays input and output voltage and current. 2.Adjustable output voltage. 3.Supports various batteries such as lead-acid and lithium batteries. 4.High-efficiency synchronous rectification solution. 5.High-efficiency MPPT real-time tracking function,rainproof,dustproof and shockproof.<br><br>Open circuit voltage:18V-55V Maximum power voltage:17V-55V PV input power:300W Operating temperature:-409°C-+659°C Installation line length:5CM Installation hole spacing:110mm x 70mm Installation hole diameter:5mm Colour:As Shown Material:aluminum<br><br>Package Contents: 1 x Battery Recharging Controller (Tag Random Do not accept designation)<br><br>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.