Users tips: The mosquito trap killer in the bedroom must be opened in advance(at least 3 hours). Do not turn it on until bedtime. The effect is better in uninhabited environment, because people’s body temperature and smell are more attractive to mosquitoes. This product uses the physical way to kill mosquitoes, it can't kill a mosquito when just turning it on. Do not open the bottom tray immediately in the morning because the mosquitoes trapped inside the tray may fly out. Keep it running for 2 more hours so that the mosquitoes suffocate to death. For the trap to work efficiently it should be placed far away from the fan and the room should be kept as dark as possible. Specification: Item size: 19*13cm Packaging size:13*13*19.5cm Weight: 400g Color: Black & White Nominal power: 5.0W Rated voltage: 220V Scope of Application: This product is widely used in villas, courtyards, houses, hospitals, bars, apartments, restaurants, cafes, cinemas, farms and other venues. Warm Tip: Never let the baby close to or close to the source of direct vision lamp.