Ultra-Quiet Powerful Motor: Built-in quiet pure copper reversible motor, lower than 30 decibels when working, suitable for studying, working, sleeping and resting. The reversible function is suitable for any season. The forward rotation will bring you strong wind in hot summer; the reverse rotation will promote indoor air circulation in cool winter. Bladeless Ceiling Fan for Indoor Outdoor: 20.5in*6.5inch in size. (520mm in diameter, 165mm in height) . Covering space dimensions up to 100-170 ft², such as bedrooms, living rooms, study rooms, children's bedrooms, kitchens, offices, conference rooms, etc.The remote control distance is up to 10m, adjust the mode you want anytime, anywhere. The applicable battery for the remote control is 2*AAA (NOT included in the package) Flush Mount Ceiling Fan Timing Memory: Adjustable 1/2/4/8 hours timing. Set it up before going to bed, it will automatically turn off when you fall asleep to save energy. With memory function, the next opening will still retain the previous mode for convenient use. The geometric curve design increases the visual beauty and is suitable for most home decoration styles. Ceiling Fans with Lights and Remote: Provide you with 6 wind speeds, 3 adjustable color (cool, warm, neutral light). The function of fan and lighting can be controlled separately, making the ceiling fan light both beautiful and practical. After-sales service: The special design of this semi-open fan makes it easy to clean and safer to install and use. The package includes 1*ceiling fan, 1*accessory pack, 1*remote control, 1*instruction manual. Please carefully follow the installation steps in the manual when installing the fan. If you have any questions, please feel free to contact us, we will answer you comprehensively.