Ring to Cage Pro Digital Timer for Muay Thai, MMA, Kickboxing, Boxing, Martial Arts Professional digital gym timer with lights Workout time can be adjusted from 31 seconds to 9 minutes. Easy adjustment Rest time can be adjusted from 30 seconds to 5 minutes. Includes end-of-round warning whistle Advanced lighting system for easy visuals. Super large 2" digital display. Extra loud round bell Ideal for all Boxing, Muay Thai, MMA, grappling fight rounds and timed training workouts. One year warranty. Power supply: 110V, USA and Canada plug