I received this as a present, but I'm selling it because I only used it once and it didn't suit me. Smart Neck Kiwami is a neck EMS device that combines four functions: "EMS, heat, sonic vibration, and LED." It was developed as an EMS exercise device to target the muscles around the neck and shoulders, which are prone to strain. The combination of medium-frequency EMS muscle stimulation, physical vibration from a motor, red LED, and intuitive warmth from a heater creates a three-dimensional and gentle user experience. With a weight of approximately 126g, this high-end neck EMS device offers a full range of features and allows for easy care in just 15 minutes. Manufacturer's suggested retail price: 14,300 yen Product Name: Eviden Smart Neck Kiwami Type: Home-use EMS device Model Number: HL-SK53 Body Size: Approximately W127 x D154 x H34mm Weight: Approximately 126g (body only) Power Supply: Built-in lithium-ion rechargeable battery Input Terminal: USB Type-C (for charging) Input Rating: 5V - 1A Charging Time: Approximately 3 hours Materials: ABS, stainless steel, silicone Set Contents: Main unit, USB cable, instruction manual Please understand that this item is stored at home and is a used product.