Feature:1. EFFECTIVE WARM: The electric heated neck wrap has a built in heating pad that is suitable for warming your neck and can be used as a hot compress tool2. HEATING AND VIBRATION: The electric neck heating pad comes with 3 adjustable heating modes and 3 vibration modes to meet your different needs3. USB POWERED: Can be plugged into 5V2A USB power supply(such as mobile power supply, USB adapter, PC USB port) to work. While the heating pad can't be charged, you can use a portable power source to move around when an outlet isn't nearby4. ADJUSTABLE FOR A TIGHT FIT: To ensure a better feeling of heat, you can slightly adjust the hook and loop fastener of the portable neck heating pad to fit closer to your neck5. TECHNICAL PARAMETERS: Portable electric heated neck wrap heating temperature from 45, 55, 65, massage level has three levels to meet your different needsSpecification:Item Type: Neck Heating Pad Size: Approx. 57x14.5cm / 22.44x5.71inHeating Temperature: 45-55-65Massage Levels: Three levelsMaterial: Non woven fabric.Package List:1 x Neck Wrap1 x USB CableNote:Please allow 1-3cm error due to manual measurement. Thanks for your understanding.