Features16 MASSAGE HEAD: The neck massager uses six head massage, which enlarges the massage range, effectively stimulates the neck muscles and improves muscle soreness 2ELECTRICAL FREQUENCY PULSE: The neck massager uses electrical frequency pulses to penetrate into the muscles, combined with the massage technology in the core chip, to promote local circulation to achieve a relaxing effect 342C HOT COMPRESS: The neck massager has a hot compress function, 3 seconds rapid warming PET technology, promotes blood circulation, accelerates local metabolism 4ERGONOMIC DESIGN: U shaped design is more ergonomic, with 6 massage head, U fits the neck curve better, and is comfortable to wear 5USE with CONFIDENCE: The smart button sound allows you to adjust more accurately. The electrode sheet is made of 304 stainless steel, which is delicate to the touch and not allergicSpecificationItem Type:Neck MassagerMaterial: Stainless SteelProduct Size: Width: Approx. 14cm / 5.5inLength: Approx. 15cm / 5.9inPower Supply Mode: Lithium BatteryBattery Capacity: 700mAh (shipped with built in battery)Applicable Symptoms: Stiff Neck when Working with Your Head Down for a Long Time; Staying Up Late to Scan the Screen, Watching Drama and Playing Games; the Cervical Spine is in a Passive Stretch State for a Long TimeFor People:Office Staff: Sedentary Cervical PainDriver: Fixed Posture FatigueYoung Man: Stiff Neck when Playing with Mobile Phone6 Modes: 01. Combination Mode, 02. Scraping Mode, 03. Acupuncture Mode, 04. Percussion Mode, 05. Massage Mode, 06. Hot Compress ModePackage List1 x Neck Massager 1 x USB Charging Cable