4" Da/Night Solar Vent Stainless Steel

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).