Switch on TENS, Switch off Pain! The TENS unit MStim Reha LGT-231 is a CE-marked, FDA-cleared pain relief medical device, alleviating pain by delivering low-level electrical impulses. It is an low-risk, non-invasive, and non-medicine pain management method and can be applied to wherever the pain is. Highlights Compact and Portable Battery-Operated 2 Channels NMES & TENS A Wide Range of Indications Preset Protocols with Pad Placement Guidance Custom Protocols User App Control - “MStim Reha” Certification: CE, FDA, Health Canada 2 Years of Warranty