Note: There are 2 types. Pls check carefully before order. Thanks. White Tens: TENS Unit Electronic Pulse Massage 2 Channels LCD EMS Massager Back Neck Stress Sciatic Pain and Muscle Relief Note: Contact us for Spanish User Manual in PDF version if you need:) Description: TENS:Used for temporary relief of pain associated with sore and aching muscles due to strain from exercise or normal household work activities. EMS: used to stimulate healthy muscles in order to improve and facilitate; muscle performance Features: RELIEVE PAIN: Premium quality mini massager with 15 pre-programmed massage modes, possessing both TENS and EMS, efficiently alleviate pain in shoulder, back, waist, ankles, arm,leg, and wrist at anytime in anywhere. ADJUSTABLE STRENGTH & TIME: Adjustable intensity level and time meets different demands. 40 intensity levels and 30 minutes default timer which can be adjusted from 30 to 90 minutes provide a more flexible way to achieve pain relief. 2 Channels output: Dual outputs provides simultaneous treatment for 2 persons or different targeted areas. PORTABLE:This mini massager is pocket size and lightweight so could be taken with you anywhere, which helps relaxing muscles when you are in the office, travel or at home. Specifications: Housing material:ABS Number of channels: two channels Power supply: DC 4.5V 3*AAA Battery (Batteries not included.) Waveform: Bidirectional wave Display mode:LCD display Mode: 12 Modes Output frequency: 1-120HZ Output pluse width:100-250uS Grade of strength:0-40 Size:135*65mm Weight: 180g Electrodes: Reusable, Convenient, safety, no side-effects Applicable parts: Arm, neck, Shoulder, back, waist, abdomen, hip, knee,leg , foot, etc. Tips: Do not use the device under any circunstance if you have a cardiac pacemaker, implanted defibrillator, or other implanted metallic or electronic device _x000D_