With the Taylor 5828 dual event timer, you can time two events simultaneously! It features an easy-to-read 1.5" LCD display, and a clock and calendar function for convenience. Each separate timer on the Taylor 5828 timer has its own distinctive ring, and can be set up to 23 hours and 59 minutes. The Taylor 5828 dual event timer features a clip and magnet that allows it to be hung, clipped, or stood up. It operates on one AAA battery (included). Overall dimensions are 2 1/2"W x 3"H.