Timex 'Ironman'. Purchased my first one when I was active duty USMC (I should be wearing the Timex 'CouchPotato' but I can't find one). The **CENSORED****CENSORED****CENSORED****CENSORED** thing just wouldn't quit but I ended up losing it. The one I have now I purchased about 5 years ago for $30. I've never replaced the battery but I did have to replace the band ($5). For the price, you can't beat it.