Reusable, discreet, safe and effective Temporarily relieves muscle pain 75 program/level combinations Multi-use for back, shoulders, arms and legs. Includes 1 control unit, 2 AAA batteries, 2 reusable electrode pads: Body pad - 4.33 in x 2.76 in (11 cm x 7 cm), Back pad - 3.74 in x 7.48 in (9.5 cm x 18.99 cm). What is TENS Therapy? TENS stands for Transcutaneous Electrical Nerve Stimulation TENS therapy gently stimulates the body's nerves with relaxing pulses that provide temporary relief of pain associated with sore and aching muscles. Why use TENS Therapy? Safe and effective: Blocks pain signals at the source Reusable: For multiple sessions of pain relief Discreet: May be used while performing everyday activities Mobile: Wire-free device can be used on the go Convenient: Includes easily replaceable AAA batteries Average device usage: Varies widely depending on use, body type and care Electrode pad: 10-25 sessions Control Unit: 1+ year of use Batteries: 30+ sessions Additional refill pads sold separately. Walgreens Pharmacist Recommended^ Learn more about Walgreens brand products ^Our pharmacists recommend the Walgreens brand. **Satisfaction Guarantee valid on Walgreens owned brand products only. Made in China 100% satisfaction guaranteed Step 1: Clip the control unit to the electrode pad. Step 2: Remove the backing from the electrode pad. Step 3: Apply directly to the pain area and activate. See instruction manual for all directions, warnings and device usage. Transportation and storage conditions: -10 - 55C, 10 - 90% RH humidity, 70KPa - 106KPa Use for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, upper extremities (arms) and lower extremities (legs) due to strain from exercise or normal household work activities. ©2021 Walgreen Co.