1. Double Host Design: Single massage with double body sensation, easy to massage different parts at the same time, and different massage methods can be set.     2. TENS Low Frequency Pulse: Relieve and relax muscles from the . Low frequency pulse massage technology can continuously and gently stimulate nerves, muscles and cells.     3. Muscle Electrical Stimulation Technology: Simulate the feeling of patting, kneading and touching your shoulder and neck, make muscles contract and relax, and mainly promote blood circulation.     4. 8 Modes: Selected for all round relief, and 8 modes are equipped to adjust to meet your massage needs, and massage with you to relieve fatigue.     5. Concave Convex Blind Control Design: The icon is a key, all functions can be controlled with one finger, which can effectively reduce chronic pain in neck, waist, buttocks, legs, feet, head and other parts.         Specification: Item Type: Neck Patch Massager     Material: ABS     Applicable Parts: Neck, waist, buttocks, legs, feet and head.     Massage Mode: 8 kinds. Knead, beat, massage, shape, activate, squeeze, train and beat.     Strength Adjustment: 16 gears     Product Function: Pulse     Massage Contacts: 2pcs     Battery Type: Lithium ion battery     Battery Capacity Of Charging Box: 450mAh(built in)     Host Battery Capacity: 2pcs 60mAh(built in)     Host Timing: 15 minutes     Product Size: Approx. 95 x 61 x 46.5mm / 3.7 x 2.4 x 1.8in     Working Temperature: -10& 8451;~45& 8451;              Package List:     2 x Hosts     2 x Massage Patches     1 x Charging Box     1 x USB Cable     1 x English Instruction Manual