8 sets featuring fat burning training mode with time, countup, and countdown options. Magnetic strip attaches to iron furniture for secure mounting; USB rechargeable for easy, wireless use. Loud timer volume provides clear workout time management in busy gyms or classes. Bright LED display offers visibility from every corner of your workout space; ideal for home gyms, garages, or commercial facilities. Use scenarios Home gym interval training: mount on a weight rack or metal surface to manage rounds and rest periods during fat burning workouts. Group classes or training: place at a central metal surface for easy viewing by all participants and efficient time control. Commercial gym stations: mount on metal cabinets or racks to keep coaching sessions and circuits on schedule with clear, audible timing.