LCD DISPLAY & SILENT: Display: Easy-to-read LCD for clear control. Silent Operation: Provides a noise-free massage experience, enhancing relaxation. YOU TRAVEL COMPANION: Mini Size: Soft silicone material with a permanent shape, making it portable. Versatile Use: Suitable for use in various places like the office, outdoors, gym, or while traveling. Not recommended for use while driving. RECHARGEABLE & LONG BATTERY LIFE & KIND SERVICE: USB Powered: USB charging cable included (Changing plug not included). Battery: 1200mAh capacity for extended use. Charging Options: Can be charged via a power bank, PC, or adapter. Ergonomic Design: Pentant-shaped electrode design for conventional massage of shoulders, neck, arms, and other body parts. PORTABLE AND CONVENIENT: Ideal for those who exercise or work long hours, providing deep relaxation and relief from muscle tension and fatigue. TECHNICAL SPECIFICATIONS: Input Voltage: 5V Working Voltage: 3.7V Charging Power: 2W Battery Capacity: 500mA Charging Interface: Type-C USB Line Length: 50cm Constant Temperature: 42°C DIMENSIONS AND WEIGHT: Product Size: 57 * 54 * 18mm Packaging Size: 195.5 * 177.5 * 60.5mm Box Size: 44 * 35.8 * 40cm (56pcs/15.0kg) Gross Weight: 260g Net Weight: 105g PACKAGING LIST: 1 * EMS Cervical Spine Massager 1 * Charging Cable 1 * English Instruction Manual