Features1Double Host Design: Single massage with double body sensation, easy to massage different parts at the same time, and different massage methods can be set. 2TENS 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. 3Muscle 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. 48 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. 5Concave 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.SpecificationItem Type: Neck Patch MassagerMaterial: ABSApplicable Parts: Neck, waist, buttocks, legs, feet and head.Massage Mode: 8 kinds. Knead, beat, massage, shape, activate, squeeze, train and beat.Strength Adjustment: 16 gearsProduct Function: PulseMassage Contacts: 2pcsBattery Type: Lithium ion batteryBattery Capacity Of Charging Box: 450mAh(built in)Host Battery Capacity: 2pcs 60mAh(built in)Host Timing: 15 minutesProduct Size: Approx. 95 x 61 x 46.5mm / 3.7 x 2.4 x 1.8inWorking Temperature: -10~45Package List2 x Hosts 2 x Massage Patches 1 x Charging Box 1 x USB Cable 1 x English Instruction Manual