4 Inch Wall-Mounted Exhaust Fan, Small Bathroom Fan, IPX4 55CFM Window Extractor Fan w/with Anti-backflow Check for Toilet, Office, Kitchen

IPX4 WATERPROOF: The grilles panel window exhaust fan is made of high quality ABS material; Ultra high waterproof IPX4 rating to place it in where need exhausts moist.
COPPER BALL BEARING: Full copper with ball bearing ensures a stable and long lasting performance. 4-inch performance: Power: 10W; Air Flow: 95m³/h (55CFM); Noise: 30dB; Working Voltage: 110~127V / 60Hz.
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.
4-INCH COMPATIBLE: The outer diameter is 100mm (4-inch), especially designed for 4" round ducting system or hole. Ideal replacement exhaust fan for toilet, WC, kitchen, bathroom, office, garage, or any rooms need exchange the air.
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 to reach the maximum air flow.