I found my old ShotMaxx that I bought when it first came out. The beeper wasn't loud enough for me and my other shot timer was more versatile for for my needs. I don't know if it needs a new firmware update or not. You will need a micro USB cable to charge it.
Rules: 1) Post here if you are interested in it; 2) Site Supporters Only; 3) Ships via USPS to the US only.
Thanks!