Specifications  Item name: Air Compression Leg Massager  Material: Linen + Mesh  Rated Power: 7.5W  Rated Voltage: 5V  Battery Capacity: 1850mAh  Timer: 30min  Use Time: about 5 hours  Size(Unfold): Approx. 59*35*0.25cm  Quantity: 1Pc or 2Pc    Features  1.Easy to use, just slip on the calf and activate it with the controller by pressing the operation buttons, free to switch massage modes and adjust the compression levels as your own comfort, and get ready to enjoy it either sitting on the chair or lying on the couch.  2.Provides soothing air compression massage to relax the muscle tension and promote blood circulation which can effectively relieve the pain and fatigue of your legs.  3.One size fits all, the hook and loop type fastener straps can allow for wide compatibility with custom wearing fit, quick to wear and release.  4.Built-in rechargeable 1850mAh lithium battery can be powered by USB charging for wireless application, tangle free to enjoy continuous massage at home, in your office and even during your travel.    How to use:  01 Please check whether the leg massager can normally work before use. If not, charge it fully to check again.    02 Release all the fastener straps to make the leg massager completely unfolded.   03 Fix the massager on the calf with perfect custom fit and make sure the controller unit facing upwards.   Note: Can be worn directly on your calf or through clothes.    04 Long press the power button to turn on the machine. It will enter Mode C1 and the indicator lights will be on.    05 Press the mode button to switch(Mode C1/C2/C3).    06 Press the intensity button to adjust(P1-P2-P1).    07 The default timer is 30 minutes.    08 The leg massager will NOT work during charging. The white LED lights will blink alternately when charging and all the lights will be bright on after fully charged.