【Multi-Function Dock】This Joy-Con charger can charge up to four Joy-Cons simultaneously, allowing you to quickly fully charge your controllers. It also has a USB port, so you can connect other controllers like the Switch Pro at the same time. In addition, it has two slots for storing game cards. 【Space-Saving】This charging dock for Switch Joy-Cons takes up very little space. You can keep all your Joy-Cons on the charger, which keeps your desk tidy and allows you to organize everything together. 【Efficient and Convenient】With a slim size of 16.7*4.3*13.5cm, it's portable. It can be fully charged in about 3.5 hours, making it suitable for users who have multiple Joy-Cons, and it's a must-have for those who often play games with family and friends. 【Ease of Use】The red and black lights are displayed when installed, and the lights do not turn on if not installed. Once installation is complete, you can start charging. 【LED Indicator】There is an indicator lamp under each Joy-Con socket, which is green when stationary and red when charging, so you can check the charging status at any time.