Feature:1. Smart Charging: High efficiency MPPT real time tracking function, suitable for solar panels of different voltage.2. Better Designs: Adopting efficient synchronous rectifier circuit structure to ensures quick and stable charging.3. Great Matching: 10-30V output voltage supports various batteries, enables a wide range of application.4. Working : With short circuit protection, over temperature protection, under voltage protection for .5. Reliable Using: Equipped with LED screen to display volt and current, also waterproof, dust proof and shock proof.How to Use:Key Operating Instructions: Users can directly adjust the output charging voltage of the MPPT solar charge controller. The specific operation method is as follows:1. Under normal working status, press any key of + or ‑ once, the controller will enter from Normal Working mode to Output Voltage Setting mode, and the displayed number will change from Current Output Voltage Value to Current Set Voltage Value, and flashes continuously.2. The user can press the + or ‑ key to increase or decrease the Output Voltage Setting Value. Each click of the key changes 0.1V. Press and hold the key fo