The boxing timer has a built-in battery that lasts for 20 hours of continuous operation, as well as a charger. The timer is equipped with a loud speaker, so that it will be audible even in competitions, and a large bright display can be seen from a distance.
The timer functions:
selection of the working time (round) from 10s to 10 minutes, with a time interval of 10 sec (default 3 min)
selection of the time of a break from 10 seconds to 10 minutes, with a time interval of 5 seconds (default 1 minute)
selection of the number of rounds from 1 to unlimited (by default 3 rounds)
select a period in the round (short beep) from 10 seconds to 5 minutes (default 0)
The set includes: boxer timer, instruction (in Russian)