Feature●Compact interval timer that can set 1 or 2 intervals, from 2 seconds to 99 minutes●Stopwatch with built-in clock function Secure and removable belt clip●Auto mode function for repeating intervals. Alarm and Vibration to remind you of interval: The alarm seconds can be set to 1 second, 2 second, 5 second, 9 seconds●Pager size Uses 1 AAA battery (not included). ; Measures 2.25 x 1.75 x 0.5 inches (55mm x 44mm x 14mm). Sweat and shock resistant construction●Crossfit, HIIT training, cardio, weight lifting, muscle training, running, boxing, martial arts, kettlebells, body for life diet, Learn-to-Run program, MMA, taffeta training, etcDescription Small and easy to use dual interval timer, GYMBOSS interval timer & stopwatch This multi-use timer is versatile enough to help you work out smoothly, with virtually any type of exercise program. With this timer, a minute break actually rests for 1 minute and a 45 minute workout means you get a firm 45 minute workout. Maximize the effectiveness of your workout to enhance your cardio endurance, muscle mass, cardio endurance, maximum oxygen intake and increase fat loss. Gymboss - Train hard and smart