Designed with various functions for deep relaxing and soothing sensations, target any specific area of your body that needs attention, including tense muscles. Featuring the largest LCD of all HiDow models, this FDA-approved, Class II Medical device is designed with 24 modes of TENS (pain relief/relaxation) and EMS (muscle/fitness performance) functions and 20 intensity level settings per channel. The XPDS 4/24 is also equipped with an adjustable timer, 4 output channels, and a rechargeable lithium battery. 2 sets of Large single-sided adhesive electrode pads (2.4-inch diameter, circular shape). 2 sets of XL (extra-large) single-sided adhesive electrode pads (rectangular shape). 1 set of Ear Clips.