Neck-type Micro-current Cervical Spine Massagers Portable Shoulder and Neck Massagers Hot Compress Smart Neck Protection Device Dredge Spine Features 1. +EMS double pulse technology, deeply Massagers the muscles, relax the cervical spine, relieve neck fatigue, and effectively improve various neck problems such as shoulder and neck strain, pain, soreness, stiffness and discomfort. 9 Gears for u to check and use 1-3 gear Applicable Daily neck maintenance 4-6 gear Applicable Chronic cervical Strain 7-9 gear Applicable Neck Injury of pillow 2. Three-level constant temperature hot compress (42/47/52) can effectively promote blood circulation, unclog blood vessels, relieve neck pain, and relieve cervical spine pressure. 3. 4 Massagers modes, 9 adjustable inity, you can ly adjust according to your personal tolerance and preferences. 4. Small and light body, pendant-style innovative design, comfortable to wear, easy to carry, enjoy comfortable Massagers anytime, anywhere. 5. The ergonomically designed electrode pads conform 270 to the curves of various parts of the body, such as legs, arms, shoulders and neck. 9 Gears for u to check 1-3 gear Applicable Daily neck maintenance 4-6 gear Applicable Chronic cervical Strain 7-9 gear Applicable Neck Injury of pillow UPDATE : charging port-----TPC Specifications Material: ABS Color: silver Weight: 0.22kg Packing size: 19.2*14*4cm Rated voltage (V): 5v/1A Net state current: below 1uA Rated power (W): 5W Battery capacity: 550Ah charging port: TPC Package Included: 1* Neck Massagers 1* TPC Charging Cable 1* English User Manual Package