A lot of guys train at home, in their garage, at the local YMCA or somewhere that is not a boxing gym and could really use a ringtimer. A big part of proper boxing training is to perform a lot of your work based on a typical boxing round, 3 mins on and 1 min rest. I’ve been using a track for years that has intervals broken out precisely this way.
Go to the link below and download this file I made (right click and save target as), it will come in handy as your portable Ring Timer, rounds of 3 mins and 1 min off. Put it on your mp3 player, burn it to CD or overlay it onto music you like to train to if you have a digital music mixer (I used Acoustica). Enjoy, and let me know what you think.