Has anyone used these before for a jetski?

Humminbird HDR 610 In-Dash Digital Depth Sounder w/ In-Hull Puck Transducer
Improved bottom tracking performance 600' max. depth Great for ski boats and runabouts, Humminbird digitals are completely waterproof with easy-to-read, large backlit LCD displays and exclusive bottom tracking technology. Features include shallow and deep alarms and keel offset. 200 kHz, 20 cone angle. 2-1/2" dia. x 4-3/4"D. Standard mount in 2-1/8" opening. Includes white and black faceplates and bezels. Transducer can be glue/mounted inside the hull.