Having sufficient air movement inside your grow room is important for moving stale air away from the leaves of your plants. These clip-on fans act to constantly keep fresh air flowing, taking on the role of wind in nature. Oscillating for maximum effect, clip-on fans are a must for any grower. Specification 180 mm fan dimension 220V input voltage Super quiet motor Three Usage, Desk Fan, Clip fan, Wall fan A perfect size for multipurpose use Easy 2 speed control Safety net cover design Effective energy-saving humanized design Static breeze and pleasant voice Clip design,can be flat clamp on things You can adjust the angle