Feature: 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 inside out. 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℃~45℃. Package List: 2 x Hosts2 x Massage Patches1 x Charging Box1 x USB Cable1 x English Instruction Manual