Multi-Voltage Compatibility This control switch works with various battery voltages such as 2V, 3.7V, 4V, 11.1V and 12V, providing charging solutions tailored to your needs. Automatic Light Management Automatically charges batteries in daylight and activates the outdoor lights at night while turning off at dawn for effortless operation. Built to Last Made of high quality materials, this control switch promises durability and reliable performance over extended periods of use. Portable and User Friendly With its straightforward design, this control switch is easy to handle and carry for various outdoor lighting applications. Use scenarios - Garden lighting system using a 12V battery for automatic day charging and night illumination. - Remote shed or cabin lighting powered by an 11.1V battery with automatic on/off control. - Portable outdoor events or camping setups using 2V or 3.7V battery packs for simple, reliable operation.