Product descriptionSize: 19 * 14 * 5cmColor: black, redMaterial alum + pp + ABSNominal voltage AC110-220V, 50 / 60HzNominal power 20-30wSpeed range 1200-3000 rpmCharger 12V / 1AWorking time 4 hoursPackage contents:1 * product host1 * instruction1 * USB data cable1. Deep muscle massage High frequency vibration can directly reach deep muscle tissue, connective tissue, quickly remove the lactic acid produced by the body after exercise, and effectively relieve the back, neck, chest, waist. Legs and other muscle pain positions, suitable for all types of athletes and fitness enthusiasts2. 5 ADJUSTABLE SPEEDS 5 adjustable speeds can meet your requirements. Perfect for people sitting in the office, people on post-operative recovery, athletes and the elderly.3. Small and light Excellent humanized design, ergonomic requirements, easy to hold, cell phone size, can be easily stowed in bags and backpacks, no heavy tool boxes required, suitable for carrying.4. Long standby Fully charged and can be used continuously for more than 4 hours, enough for short trips, ATTENTION: Please charge when the device is switched off With a housing made of a high quality alum + pp + ABS, the massager has stronger heat resistance, scratch resistance and heat dissipation.5. Applicable to various places The muting function is very powerful, and the sound level of only 45dB can effectively avoid noise and disturb others. It is suitable for use in bedrooms, gyms, offices and outdoors.