Gymboss GB2010 BLACK SOFTCOAT Compact interval timer tracks one or two intervals between two seconds and 99 minutes Protected by rubberized, high-grip finish; water- and impact-resistant Chime and vibration interval notification; alarm duration can be set for one, five, or ten seconds; built-in stopwatch feature Powered by one AAA battery (not included); measures 2.25 by 1.75 by 0.5 inches (W x H x D) Includes limited one-year manufacturer's warranty