Specifications:Color: White/Pink/Dark BlueSize: 142*138*60mm/5.59*5.43*2.36"Material: ABS + 304 stainless steelWeight: 160gCharging mode: USBVoltage parameters: DC5V; 1A; 5WBuilt-in lithium battery capacity: 450mAhDuration: Massage 15 minutes a day for about 1 month.Mode: Acupuncture and moxibustion mode, massage mode, and knocking mode.How to use it?NECK MASSAGER WITH HEAT---The intelligent neck massager built-in heating function and 107.6F constant temperature and warm compress technique, as comfortable as a hot towel. It has an interior sensor and programs, which can control the temperature precisely and avoid excessive heat, and the independent button is preserved so you can switch the heat function on and off separately. If you still cant stand this function, just turn it off!3 MODES 15 LEVELS OF INTENSITY---Press the button for 3 seconds to start. Press the "heat" button to turn on/off heat mode. Press the"mode" button to switch mode between massage, knead, and acupuncture, choose your favorite massage mode from them. Press The "+" or "-" to adjust the massager strength level. The neck massager has a 15-minute auto-off function to ensure you a safe massage experience. The best gift for your mom or anyone you loved.CORDLESS AND LARGE BATTERY CAPACITY---Portable design, We've made it cordless, worry no more about wires, it's much more convenient without a wire connection between controller and massager. In order to bring a comfortable massage experience, it has to be light enough, This massager is only 0.36lb weight, lighter than most smartphones, now you can use it at any time and anywhere. The battery has a large capacity, which makes it able to work 10 days after fully charged and works for 15 minutes per day.You Need Know---This neck massager gives out mild and gentle pulsating vibrations through the contact sheets, It's normal if you have a feeling of slightly electric shock when used. If you have metal IMPLANTS or PACEMAKERS, we DON'T recommend you to have this massager cause it may disrupt the operation of the metal implants. Please read the manual carefully before use.Note:!! INTELLIGENT NECK MASSAGER---Traditional physical massager can only act on the surface, temporarily relieve the neck pressure. But the electronic neck massager uses pulsed current to strengthen blood circulation to reduce shoulder and neck pain and migraine headaches caused by long-term working. So there will be a slight sense of current in use without obvious physical massage feeling.!!Electronic pulse therapy is not effective in short-term use, it is recommended to stick to long-term use.Package Include:1X Electric Neck Massager