LYAMBDA LW4 is a wireless charger compatible with all Qi-standard devices. It has a built-in 5000mAh battery, so it can charge your devices even when there is no power outlet nearby. The LYAMBDA LW4 also has a built-in USB-A output, so you can charge multiple devices at the same time. It also includes a charging module compatible with Apple Watches (Series 1, 2, 3, 4, 5). The LED indicators on the front of the device show the battery level and charging status. The LYAMBDA LW4 is a convenient and versatile charger that can keep your devices powered up and ready to go.