No outlet? No problem. Designed for use with the Game Ready GRPro 2.1 Therapy System Control Unit, this rechargeable battery ensures continuation of treatment when an outlet is inconvenient or can't be found at all. This Battery Pack will provide up to 7 hours of portable power, making it ideal for treatment on the go and under adverse conditions. Please note, this is the Rechargeable Battery Pack only. Wraps, Control Unit and additional Game Ready accessories are available separately. Complete kit includes the Battery Pack, A/C adapter, battery connection cable and a carrying case. Weighing in at less than a pound and smaller than 8", storing or taking the battery on the go is a breeze. Fully charges in just a few hours. LED power meter instantly informs user of remaining power at just the push of a button. The adapter will display a green light during the charge cycle. Once all four LED lights turn blue on the battery, the battery is fully charged.