CH121 scent machine is luxury style with inner fan, adopting the cold air diffsion technology, applicable for the high-end commercial places hotel lobby, VIP rooms and more places. It could cover from 1000-2000 cubic meters. The scent intensity and working time is ajustable based your business time. Features: With build-in fan Auto Lock function Stand alone No need installation. Perfectly for 1000-2000m3 areas. With durable metal material. Adjustable working time 24 hours and 7 days and intensity. Automatic control program. Technical Data: Model No.: CH121 Shell Material: Metal Color: White and Black Dimension: 155 X 155 X 520mm Net Weight: 6 kg Power Supply: DC12V14W Coverage:1000 to 2000 m3 Installation Way: Stand-Alone Bottle Capcity :1000ml Noise Level: 42 db(a)