Marinco 4" Day/Night Solar Vent - Stainless Steel [N20804S]

4" Day/Night Solar Vent - Stainless Steel Features: Circulates fresh air in boat cabin eliminating mold, mildew and musty air  Moves 1,000 cubic feet of air/hour or 24,000 cubic feet of air/day (4" model)  Rechargeable battery allows for 24-hour continuous operation  Whisper quiet fan operation  No wiring required  Built-in on/off fan switch, LED lights and intake/exhaust switch High capacity NiMh battery operates vent for up to 24-hours without sunlight on a full charge  Threads into included deck plate and can be removed from outside without tools  Complete air and green water shut-off from below  All Day/Night Plus models come complete with white plastic interior trim ring, insect screen, mounting hardware and an easy-to-understand installation manual  Replaces NICRO 3" & 4" snap-in deck plates (fits existing holes once snap-in deck plates are removed) Quick Guide (pdf)