Style: Modern Material: Plastic Power source: Battery Powered Special feature: Heat, Fatigue relief Is it cordless?: Yes Water resistance level: Not Water Resistant About this item: DEEP INTO THE TISSUES: The Heated Neck Massager penetrates deep into the skin, simulating various massage styles for a comfortable experience. It helps relieve sore muscles, neck stiffness, cervical fatigue, and promotes relaxation after a long day at work. ERGONOMIC DESIGN: Designed with 3D smart fit technology, the Neck Massage Machine easily adjusts to the curve of your neck. Its flexible, streamlined ring design conforms better to the size and curve of your neck. 6 MASSAGE MODES: Equipped with a built-in smart chip offering 6 massage modes, combining various simulated human massage techniques for effective deep muscle relaxation. Modes include adaptive gear, acupressure massage, pressure massage, percussion, percussion and kneading, and rapid hammering pressing massage. THERMOSTATIC HOT COMPRESS: Features a built-in temperature controller that heats up quickly within 3 seconds and maintains the temperature. Compact, lightweight, and portable, it can be taken anywhere, allowing for a comfortable massage experience while traveling. This model operates on batteries. HOW TO USE: Press and hold the power button for 3 seconds to start the massager. Briefly press the power button to activate the heating function. Use the + button to increase pulse intensity. Use the - button to decrease pulse intensity. Press and hold the start button for 3 seconds to switch off.