Timer. Wind up mechanical interval timer. For recording periods from 1 to 60 minutes. Long loud ring. Great for classroom, laboratory, kitchen, hair salons, office, etc. Timer has easy to read large dial and a chemical resistant ABS plastic case. No batteries are required for these timers.

 

Note: this timer has a magnet on the back so you can mount to most metal surfaces such as a fridge, stove or range hood, filing cabinet, etc