Feature: 1. Features with short circuit protection, over‑current protection, overcharge and overdischarge protection, store electrical energy function. 2. Widely used in solar street lights, solar monitoring, solar Internet of things, solar lights, irrigation systems, intelligent systems etc. 3. Small in size and light in weight, good waterproof heat dissipation performance, high charging efficiency. 4. Built to meet standard specification, strictly follow factory quality control. 5. This product has the characteristics of low power consumption, stable charge and discharge, easy installation and maintenance. Specification: Condition: 100% Brand New Item Type: Controller Material: Aluminum Color: As shown in the picture Battery Properties/Capacity: 18650 lithium battery 12V 4000MAH-200000MAH(Included) Solar Peak Input Voltage: 30V, 50V Load Voltage Range: 9.6-12.6V, 10.0 -14.6 V Static Power Consumption: <20mA Service Life: 5-7 years Operating Temperature: -10℃-60℃ Storage Temperature: -40℃-85℃ Waterproof Rating: IP67 Widely Used in: Solar street lights, solar monitoring, solar IoT, solar signal lights, irrigation systems, intelligent systems, etc., suitable for solar power supply systems. But your device must be 12V. The output voltage of this machine is the battery voltage. If it is not within this voltage range, it cannot work. Operate strictly in accordance with the instructions! Weight: Approx.1560g/55oz . Package List: 1 x Controller 2 x Connecting Line1 x Bag of Screw(12pcs)1 x Instruction Manual Note: 1. Please allow 1‑2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Strictly follow the instructions.