Function: 1. It is obviously effective to alleviate the symptoms of cervical spondylosis,periarthritis, arthritis, and lumbar muscle strain 2. It can ease peripheral nerve palsy 3. It can ease myalgia 4. It can promote blood circulation 5. It can remove fatigue 6. There are 4 proper therapeutic modes: press, rub,vibrate and thump 7. Different automatic massager process is set according to the specific characteristics of your shoulder, waist, joint,hand&foot, and leg, which makes effective therapy Technical parameters: •Power Source: DC4.5V (Use 3*AA alkaline dry batteries or external power source.) •Frequency:2~1000Hz •Current Consumption: about 40mA (operating impedance: 500Ω) •Battery Lifetime: about 3 months if used for 3 months, 15 minutes/day (operating impedance: 500Ω) •External Size: 150 *100*46mm •Weight: 200g/PC (not including dry batteries) •Normal Operation: at 5~55°C •Environment:humidity < 80%RH •Storage and Transportation temperature: temperature -20~55°C •Environment: humidity < 10~95%RH •Safety Classification: Class II-BF Accessories:main machine,wire,electrodes pads,slipper, instruction manual，hand-bag Inner packing: 1pc/box GW:800g Outer packing: 32*20*10 cm 16pcs/ctn Carton Size: 50.5*31*36.5cm G.W.: 15kg