Near new, Unimed ProX TENS unit

Near new, mostly unused Unimed ProX TENS unit. Stimulates muscles, features 12 programmed massage modes, adjustable 20-60 minutes timer by using the “T” button. Rechargeable internal lithium battery for up to 20 hours of continuous use. Contains: controller, charger, USB cable, 3 new pairs of electrode pads (one used), 4 output 2 electrode cables, plastic holder. Unfortunately I can’t find the manual. (Plastic protection film still covers the controller face).