DESIGN & FEATURES: Tackle your pain and inflammation with the power of cold therapy, or turn up the heat to reduce tension and aches. Turns hot or cold in 60 seconds Set it and forget it. Unlike traditional icing and heating pads, Hyperice X provides long-lasting, sustained, relief without any change in temperature Hyperice X Knee has an adaptive fit that moves with you freely. Enjoy fully automated, electric contrast therapy at home or on-the-go, with no prep, no ice, and no cords Rechargeable lithium-ion batteries Lightweight design Travel-friendly TSA approved carry-on Turns from hot to cold in 60 seconds Temporarily alleviate pain and soreness. Decrease inflammation. Support injury treatment for a variety of sprains and strains. Relax and soothe stiff joints. Loosen muscle knots. Support warmup and recovery Charger cable included SPECS: Weight: 2 lbs. Battery life: 1.5 hours Size: 34 x 28 x 2 in. Control via the Hyperice App with Bluetooth connection