Product Instructions Massager heating shoulder wrap is designed ergonomically for extended comfort. Made of high quality neoprene material with over heat protection design, comfortable and safe Vibration combined with heating therapy offers complete pain relief &relaxation to muscles and reduces stress, helping accelerate recovery from injuries while delivering targeted relief from pain caused by frozen shoulder, dislocated joint, muscle sprain strain, shoulder stiff & soreness. Say goodbye to all shoulder problems 2 in 1 heat and massage Long battery life LED display Shous temperature and low battery warming How to Wear Step 1: Put over shoulder Step 2: Bond the arm belt Step 3: Adjust length and tighten Step 4: Power and choose level Specification: Charing type: 5000mAh battery Output Voltage: 5V/DC Power: 7W Charging Time: 3Hours Chest stick straps adjustement fits for 27" to 55" ，without extend strap size， Precautions 1.DO NOT recommended to use high temperature for a long time. Unplug when not in use. CAUTION:Burn or skin injury. 2.DO NOT for Pregnant women,young children and those who can not express their willingness 3.DO NOT disassemble,modify the heating film and control circuit,to prevent man-made damage to hot components 4.Batteries,connecting plugs and chargers should avoid contact with water during operation. It should be used in completely dry condition. WARRANTY&AFTER-SALES SERVICE 365Days Quality Guarantee Thank you for purchasing our product. Your satisfaction and support is our greatest motivation. Please contact us directly if you have any questions.We will provide prompt service if you encoun- ter any problem with our product. Thank You