4in Exhaust Fan for Window

IPX4 WATERPROOF: The Bathroom Exhaust Fan is made of high quality ABS material, the front panel highlights its black paint matching the modern industrial home decoration. Ultra high waterproof IPX4 rating to place it in where need exhausts moist | HIGH PERFORMANCE: The Bathroom Exhaust Fan with full copper with ball bearing ensures a stable and long lasting performance. 4-inch performance: Power: 12W; Air Flow: 120m/h (75CFM); Noise: 35dB; Working Voltage: 110127V / 60Hz | 4-INCH COMPATIBLE: The outer diameter is 150mm (6-inch), especially designed for 4" round ducting system or hole. Replacement Exhaust Fan for toilet, WC, kitchen, bathroom, office, garage, or any rooms need exchange the air | US PLUG-IN DESIGN: Standard US 2-flat-pin plug, 3.3ft (1-metre) power cord. Directly plug-in your wall socket can power on the fan. Any re-wiring or modification please consult your electrician friends | CHECK VALVE & MOUNT RING: The package also included a 2-door check valve and a quick installation ring for window mount. In any case you need a ceiling mount please remove the check valve of the bathroom exhaust fan to reach the maximum air flow | ANTI-BACKFLOW DAMPER: Features a built-in damper system that prevents air from flowing back into the room, maintaining proper ventilation and preventing outdoor air, odors, or pests from entering through the exhaust vent | QUIET OPERATION: Operating at only 35dB noise level, this exhaust fan provides efficient ventilation without disturbing your daily activities, making it suitable for continuous use in residential and commercial spaces