Specifications: Color: Black, Gray. Plug Options: US, EU, AU, UK. Power Charger: Rated input: 100~240V 50/60Hz 1A. Battery: Rated Voltage: 7.4V DC. Capacity: 2250mAh. Working Hour: 4 Hours. Massager: No-load Speed: 4200r/min. Dimension: Approx.22.5x6x22.2cm. Bag Size: 31x23x8.5cm. Features: 1. Including 6 different massage head, meeting various demand. 2. Effectively reduce muscle stiffness and sore pain, increasing blood circulation. 3. 30 speed adjustment, you can choose that you fit. 4. LED Screen of Battery and Frequency Display. 5. 2500mAh large capacity lithium battery, 6 hours stand by. 6. With over-protection, overheat protection and other safety protection devices, safe to use. 7. Suitable for recovery after sports fatigue, rehabilitation after sports injury, pain relief during the convalescence period of surgery, as well as reducing inflammatory reaction. Package Included: 1 x Electric Massager. 6 x Massage Heads. 1 x Power Charger. 1 x Portable Bag