Massager introduction: 4 massage hands: three-dimensional curved distribution, soft contact fit; 28 massage heads: multi-directional rotation for a comfortable experience; 84 massage points: able to accurately press the scalp acupuncture points; Massage head material: antibacterial silicone Massage hand design: shallow mouth curvature, not afraid of entanglement of hair; avoid long hair knots; Body material: ABS engineering plastics Sound: mute; Handle design: fits the hand of the person, easy to grab and prevent hand slip; Cleaning: 4 massage hands can be cleaned, replaced, safe and sanitary; Product size: 11.2*11.2*14cm; Waterproof rating: IPX7 Packing quantity: 24pcs; Packing size: 46*29*35cm; Certification: CE, ROHS, FCC, FDA; Power: 5W; Voltage: DC 5V; Model: ST-701; Delivery period: 15 days; Power supply mode: rechargeable battery power supply; Charging mode: USB cable + charging base; Battery capacity: 1200mA; Single charging time: 2h; Life time: 1.5h; Auto power off: Do not use automatic shutdown for 10 minutes;