SM-1028 LCD Display CES Low-frequency Pulse Smart Handheld Music Sleep Instrument Features: 1. CES low-frequency pulse, helps to fall asleep 2. Double pulse cycle waveform, deep massage and relaxation 3. 9 adjustable gears, suitable for different groups of people 4. Type-C interface, convenient charging, long-lasting battery life 5. One-button operation, simple and easy to understand 6. Suspension design, easy to carry Product parameters: 1. Material: ABS+stainless steel 2. Gear: 9 gears 3. Rated voltage: 3.7V 4. Rated power: 0.1W 5. Charging current: 0.35A 6. Interface: Type-CUSB-C 7. Battery capacity: 150 mAh 8. Charging time: about 0.5 hours 9. Battery life: about 6 hours 10. Product size: about 8.5 x 4.5cm 11. Product net weight: about 53g 12. This product is manually measured, and there may be an error of 0.1-0.2 mm and 0.1-0.2 g in length and weight; there may be a slight color difference due to display and light issues. Please refer to the actual product