Description: 1. Through low-cycle pulse technology, penetrate 3-5 centimeters below the skin to open the pain points and meridians, and lighten the pain of cervical spine. 2. Constant temperature massage. Hot compress at 42 can relax vessels, relax muscles and bones, accelerate circulation and relieve cervical pain. 3. 3 massage modes and 15-step force adjustment. A uncture and moxibustion mode, massage mode and knocking mode. 4. Shut down at regular intervals. The default 15 minutes after automatic power failure, safer, more assured. 5. USB charging. 1600mAh , charged for 2 hours, massaged for 15 minutes every day, lasted for about 1 month. Material: PC + silica gel Size: 13.8x14.2cm Color:White, Blue, Pink Cell: pol cell Charging mode: USB capacity: 1600 Ma Input standard: / 5V um power: 5W Duration: Massage 15 minutes a day for about 1 month. Mode: A uncture and moxibustion mode, massage mode and knocking mode. Note: 1. Due to the different mon and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3cm measuring deviation due to manual measurement. Package includes 1 X Back Neck Shoulder Massager 1 X USB Cable 1 X Remote 1 X User