Attwood® Livewell Aerator Switch.
Keep your bait and fish alive without draining your battery! 3-position switch lets you turn it on, off or to a cycle mode. During the cycle, it will run for 30 seconds every 3 minutes.
Includes face plate for panel mounting. For a 12-volt DC, 10-amp maximum only. Measures 1 1/4 x 1 1/4". 1/2"diam. installation hole size. 3 1/4" deep behind panel.