Function: 1. This massage pillow massages according to ergonomics, which can effectively relieve fatigue. 2. The EMS pulse reaches deep into the cerebral cortex and stimulates nerve lines under the cerebral cortex to relax muscles, contract muscles and regenerate muscles. 3. Low-frequency EMS pulses relax tense muscle groups and relieve muscle pain. 4. 15 minutes automatic timing and automatic shutdown double overheating protection. 5. There are 6 modes and 9 levels of strengths to meet the different needs of different groups of people. Specification: Item Type: EMS Foot Massager Voltage: 3,7 V Frequency: 1-100 HZ Working time: 15min Host battery: built-in battery, 180mAh lithium battery EMS applications: muscle strengthening, muscle atrophy prevention, muscle relaxation, soreness relief, muscle relaxation, muscle beauty and conditioning 6 modes: massage, kneading, scraping, elbow pressure, acupuncture, bubbles 9 levels of strength List of packages: 1 x Foot Pad 1 x Host 1 x USB Charging Cable