Five digit counter for the Frankford Arsenal X-10 Progressive Press, the counter is a very simple install in less than 5 minutes. The unit works off of press cycles, simply turn it on for the cycle that will drop the first round, in addition it has memory so you can turn it off mid session as needed and turn it back on again and it will start where you left off. Great way to keep track of your loading loading count on your press and primer count...no one likes running out of primers mid session. 
 
Kit comes with everything to install, installation requires only 4 included screws and plug in two connectors...as easy as it gets. Unit uses (one) AA battery and has months worth of battery life.