Digital Fish counter by Mad Fishen is durable and waterproof. This device can be used to keep track of anything that needs to be counted. Keep count on how many are in your live-well and how many you have released. 500+ hour battery life. Low battery indication on LCD display. Floats and is waterproof. Track 2 species of fish. Never have to recount. Automatic shut off after 4 hours. Optional alarm settings. Last count memory recall. Counts up to 999. Optional vibrating limit alarm. Runs off 2 AAA batteries ( Not Included).