Completely sealed one-piece molded plastic and waterproof for use in livewells, bulkheads and other exterior applications * Submersible and can be mounted directly to the side of the livewell, includes waterproof gasket and tightening nut * Low power consumption (only 0.3 amps) and low heat for enclosed areas * Long Life and resistant to shock and vibration * Requires 7/8" diameter hole for mounting, no screws required