Features 1Dual USB Ports: 12V or 24V PWM solar controller dual USB terminal output is more convenient in line with the needs of various electronic products. 2LCD Display: PWM solar controller adopts an LCD display which clearly displays the current battery power status allowing users to understand the working status of the controller. 3Double Button Operation: PWM solar charge controller adopts double button design which makes the operation easier and easier to learn and there is no need to worry about parameter adjustment. 4PWM Charging Mode: 12V or 24V solar charge controller adopts PWM charging mode which is convenient and fast and the working temperature is 20- and55. 5Easy to Use: PWM solar charge controller is easy to operate and small in size easy to store and carry without taking up too much space. Specification Item Type: 12V or 24V PWM Solar ControllerMaterial: ABS AluminumCharging Mode: PWMWorking Temperature: -20 to and55Product Size:Approx. 187 x 95 x 45mm or 7.4 x 3.7 x 1.8inWeight: Approx. 400g or 14.1oz Package List 1 x12V or 24VPWMSolarController1 xUser Manual Note Safe use advice1. The controller will detect the ambient temperature to adapt to the charging voltage so the controller should be as close to the battery as possible. (recommended at 30-100cm).The 2.18V solar panel is connected to the 12V battery system and the 36V solar panel is connected to the 24V battery system.3. In order to make the terminal firm use twisted copper wire as much as possible. Loose power connections or corroded wires can cause resistive connections to fuse wire insulation burn surrounding materials or even cause a fire.4. The controller is only suitable for various lead acid batteries please do not use it with other batteries (lithium batteries nickel metal hydride batteries).