Feature: Stretchable and ergonomic unit fits any size neck. Small size and Lightweight ,easy to carry and operate. Rechargeable design. It can be continuously used for 13 hours. More convenient to use. 16 kind of electric pulse speed, 3 kind of vibration speed, low and high heat degree, 6 kind of electric pulse modes and 6 kind of vibration modes are available, you can adjust it according to your need. Multifunctional. Gather vibrate massage, electric pulse massage, heating, this neck therapy instrument is designed for people who have neck pain, shoulder numbness, dizziness which caused by cervical spondylosis. Use it 30 minutes per day, you can feel more relax and become more healthy. Specification: Application: Neck Material: ABS Item Type: Massage Relaxation Electric impulse frequency: 0-1000Hz Electric impulse width: 20-400μs Pulses frequency: 0Hz - 1000Hz Pulse width: 20us -400us Power: 3VDC30mA With 6 kinds of mode With 16 kinds of strength Main function: using Electronic pulse massager to relax neck Power supply: Built In Battery Rechargeable Package List: 1 x Neck Massager Machine 2 x Massager Pads 1 x Charging Cable