Specification:Number of Massage Heads6Material of Massage Heads - EVA + PPSpeed Regulation 8 levelsChargingUSBInput Voltage5VWorking Hour2Battery Material - Lith-ium Polymer BatteryNoise45-60dpColorBlue / Red / Black - Siz23*22.2*6.5cm (9 × 8.7 × 2.6 inch )Weight1.4KGWorking Temperature10-40°CFeatures: Less Noise: Applying new-generation technology to reduce noise to 45-60dp. – Vibration Massage: Vibration principle hammering style, strong power to massage muscles. – Different Adjustment: 8 frequencies and 6 massage heads are available to meet various demands. – Multiple Functions: For warming up, soreness relief, injured muscles, muscle pain, activation, tightness relief, or for larger and stronger muscle groups. – Advantage: Reduce recover time, increase blood flow, clear lactic acid, release muscle knots, break down scar tissue, increase range of motion, reduce muscle soreness and pain, etc. – Portable Design: Wireless and handhold, it’s convenient for trip and home. – Economical Design: Installed by rechargeable Lith-ium Polymer Battery and one charging for long servicing hours. - Package included:1 x Electric Massager 1 x Instruction 1 x USB Cable6 x Massage Heads - Warnings: 1. The first time when you use the massager, please start in the low gear. 2. Do not touch the metal connecting rod which is reciprocating at high speed when the massager is working. 3. Do not use other products’ accessories and power supply. If the loss is caused, the consequences shall be borne by the owner. 4. Do not place the massager on the head or genitals, and avoid twisting the massage head or its connecting rod with the hair. This product is only for muscle relaxation. 5. Do not place the massage head in water to avoid short circuit. You can wipe it with a wet towel when it is in power failure. 6. Do not plug the motor outlet of the massager for poor heat dissipation. Notes: 1. 2. Due to light and screen difference, the item’s color may be slightly different from the pictures.