1. USB-DC 5V power input, reliable and versatile 2. Contains four sets of independently controlled charging units, each with its own built-in intelligent detection, constant current, constant voltage, and sampling circuits 3. Equipped with four sets of rechargeable batteries for the handle, which can satisfy four users to use the for handle to play games at the same time 4. USB-DC 5V charging cable, fully compatible with types of host and PC USB interfaces 5. The LED blue light at the bottom of the charger adds a beautiful landscape to the home. Instructions: 1. Insert the USB-DC 5V charging cable into the power input port of the for charger, and connect the USB plug to the USB interface of the for host or other devices. At this time, the blue LED at the bottom of the charger is on; 2. Put the rechargeable battery of the handle into the for handle, place it on the charging stand and keep good contact. At this time, the charging indicator LED of the charger unit lights up red; 3. Number of charging units and charging time: According to the number of charging units used and the power level of each battery group, the system automatically allocate the charging current of the unit and adjust the charging time. Applicable model: for Weight of a single set:354g Color:B:Black Material:ABS Package Contents: 1 * Charging base 1 * Data cable 4 * Batteries(4x2800mAh) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.