Description: TENS & EMS muscle stimulator will help manage pain issues. It helps reduce pain and muscle soreness caused by conditions like back/shoulder pain, arthritis, nerve pain, joint pain, period pain, neck pain, knee pain, sports injuries (effective in muscle recovery). Features: [Useful]The electric muscle massager stimulates sensory nerves and muscles to relax your body and manage pain when you feel the need. [15 Modes]Its machine includes 15 modes with increasing intensity from 20 levels. You can get many sensations, just like kneading mode, tapping mode, pressing mode, etc. [4 Outputs]4-channel unit can support up to 8 sets of pads and work on multiple areas simultaneously. [Portable]Relax anywhere at any time with something pocket-sized. It can be used in the office while traveling. [LCD Screen]The bright LCD is clear and easy for you to know your current selection and level of intensity. Specifications: Color: Silver Material: ABS, PC, Electronic Component Style: Practical Massage intensity: 20 gears Mode: 15 Modes Output Channel: 4 Channels Max Output power: <0.25W Setting Working time: 60min Standby time: 21 days Battery: 3*AAA batteries (Not Included) Occasion: Home, Spa, Travel, etc Package Size: 21.7*17*4cm / 8.54*6.69*1.57inch Package Weight: 450g / 0.99lb Package List: 1 * Muscle Stimulator 1 * User Guide