Never run out of battery power when you are about to score the winning point. Save money and protect the environment by using the rechargeable battery High capacity battery that lasts 2~4 times longer than the standard AA batteries Dock both of your remote and plug it into any USB port. No need to remove the battery! Blue LED light glow from the base of the dock station Package includes: 2 Ni-Mh Rechargeable battery USB cable Dual Remote Control Charging Dock Accessory ONLY. Nintendo Wii Remote control not included. Compatible with: Nintendo Wii