Features: 1. Our sleep instrument gently adjusts the body state through microcurrent, effectively relieves stress, and promotes natural sleep. It is an ideal choice for improving sleep quality and physical and mental health. 2. Pure physical adjustment, no chemical substances, safe and without side effects, long-term use without dependence. 3. Innovative settings of two modes, sleep and excitement, 20 levels of adjustable strength, help you quickly enter the ideal state and improve the quality of life. 4. The adjustable belt made of soft and skin-friendly fabric is gentle and does not irritate the skin. It provides flexible elastic adjustment function to ensure that every user can find the most suitable comfort for themselves and sleep peacefully all night. 5. Built-in high-performance battery, support Type-C interface fast charging, it can be fully charged in only 1.5 hours, strong endurance, a single charge can be used for 1-2 hours, say goodbye to the trouble of frequent charging. Specifications: Material: ABS + stainless steel Color: White Battery type: polymer lithium battery Built-in battery capacity: 150mAh Charging time: 1.5 hours Usage time: 1-2 hours Charging voltage: 5V1A Rated power: 0.6W Net weight: 38g Product size: 8*4.2 * 2.5CM (3.15 * 1.65 * 0.98 inch) Adjustable shoulder strap length: 26CM (10.24 inch) Packaging size: 10.4 * 9.3 * 4.1CM (4.09 * 3.66 * 1.6 inch) Package Included Sleep monitor* 1 Type-C charging cable* 1 Instructions inSix Languages* 1