This is a perfect LED interval timer for MMA WORKOUT FITNESS training in your gym or home or office. Function: Function one: Display time of day in 12 and 24 hours For example: 12hour format: H2 HH:MM, show H2 6:00; 24hour format: H1 HH:MM,show H1 06:00; Function two: Stop Watch (Minutes Seconds: Hundredths of a second 00:00:00 to 99:59:99) For example, it will count up from 00:00:00 to 99:59:99 Function three: Countdown & Count up in minutes and seconds (Countdown format : dn MM:SS from 99:59 to 00:00 ; Count up format: UP MM:SS from 00:00 to 99:59) For example: 15minutes countdown, input 15:00, it will countdown from dn 15:00 to dn 00:00; Function Four: Alternate timing for training and rest. (F = Training time; C= Rest time 1= First group running; like F1 MM:SS C1 MM:SS ; F2 MM:SS C2 MM:SS etc.) For example, you want to do five times exercise in 1minutes training and 15 seconds reset; You can set F1 01:00, C1 00:15; F2 01:00, C2 00:15; F3 01:00, C3 00:15; F4 01:00, C4 00:15; F5 01:00, C5 00:15; Before start, you have 10 seconds to prepare and it will beep every second. Like 3 2 1 GO. It will beep when change from work time to reset. Like 3 , 2, 1 GO. You can mute the noise if not need. Features: It can use for tabata,MMA boxing and EMOM training. Easy operate using remote controller LED with 10 years lifespan High bright LED Specification: Digit High: 2.3’’ Dimension: 16.8’’W x 4’’ H x 1.6’’ D Case material: Aluminum Mounting: Wall-mount Hang Stand on desk What included: 1x AC/DC Adapter 2x brackets and screws 1x remote control 1x clock 1x user manual; Remote battery do not included. Remote control's battery: 2XAAA