At All Performance Bicycles, we're committed to helping you reach your peak performance. The Compex Performance 3.0 Muscle Stimulator with Tens Kit is COMPLETELY REDESIGNED with a water-resistant silicone sleeve, an improved LCD display, a center navigation button, and enhanced grip. With UP TO 8 HOURS OF STIMULATION from a USB rechargeable Lithium Ion battery, it's perfect for any endurance athlete. Choose from 6 PROGRAMS including 1 Warm Up, 3 Strength, 1 Recovery, and 1 TENS to AID PERFORMANCE & RECOVERY. Elevate your training before, during, or after your ride with the Compex Performance 3.0.