Neck tens massager, therapy machine, EMS, physical machine Function:1, electrical pulses provider a soothing massage2, relieves stress3, relaxes tense neck and shoulder muscles4, samll compact and light weight5, various massage program6, 10 intensity levelsTechnical Parameters:Voltage:4.5VPower: 3WRetail box size: 26*7*21cmCarton size:49*28*38.5cmQty/ctn: 20pcs/ctnN.W: 12kgG.W: 15kg