Medi-Stim's Lectra 4 is a four-channel multi-mode interferential and muscle stimulator. The Lectra 4 unit is used to manage chronic pain, relief from muscle spasms, increase blood circulation, and increase range of motion. The Lectra 4 combination is easy enough for a patient to use for home treatment. It features 23 pre-programmed treatment protocols, a patient compliance monitor and individual channel intensity controls. It also has a maximum amplitude limiter and is available with three different language options: English, Spanish and French.