Package included: 1x Charger Dock + 4x Rechargeable Batteries + 1x Cable (Remote controller not included). Super capacity – Includes 4 high-capacity 2800mAh Ni-MH rechargeable battery packs, up to 500 recharging cycles when used properly. Eliminate the need for disposable AA batteries. Save money and reduce environmental waste with rechargeable batteries. 4 charging ports – Charges four Wii or Wii U remote controllers simultaneously. Simply insert the remotes and turn on the switch to begin charging. Built-in full-charge cutoff function prevents overcharging. Compatible with Wii and Wii U Nintendo remote controllers. USB cable length: 40.6 inches. Station input voltage: DC 5V. Battery capacity: 2800mAh. Auto and smart indicator lights: Red indicates charging; blue indicates fully charged.