specification: Item Type: Inflatable Neck Stretcher_x000D_Material: PC+PU_x000D_Neck Stretcher Battery: Lithium Battery_x000D_Neck Stretcher Capacity: 1500mah (Included)_x000D_Remote Control Battery: 2 x AAA batteries (Not Included)_x000D_Characteristics: Inflatable to increase pressure, adjustable height, massage and hot compress adjustable by remote control. Features: 1Height Adjustable: The front knob of neck traction stretcher can be used to adjust the height of the neck support to maintain correct neck posture to prevent further neck injury. 2Remote Control: Cervical traction device with 3 temperature adjustment gear, 3 time timing adjustment gear, and 3 strength mode adjustment gear, just use remote control to adjust. 3Hot Compress: Neck traction stretcher with hot compress function to heat neck while massaging neck, help to quickly relieve pressure on neck muscles, and remove neck fatigue and pain. 4Easy Use: You just need to place the neck stretcher on the neck and fix it by adjusting the front and back braces to relieve stress and pain by stretching the neck muscles, making you feel relaxed. 5Soft PC PU: Cervical traction stretcher made of soft and comfortable PU and PC material that fits your chin and shoulders, without causing any skin irritation or discomfort. PackageList: 1 x Neck Stretcher Front Part 1 x Neck Stretcher Back Part 1 x Manual 1 x USB Cable 1 x Remote Control