Pif paf liquid mosquito killer provides 100% protection against mosquitoes all night long. This ultimate value pack consists of a kit inch a 30 night refill and a extra 60 night refill. Formulated with active ingredients, pif paf is a powerful and convenient solution to offset mosquitoes and serve as the first line of defence against potential diseases and health hazards. The device starts working typically 5 min after plugged in. On top, the device has a superior heating system that ensures low electricity consumption and the dual-mode machine with high and low-intensity modes, make sure you and your family stay protected always. Liquid vaporiser bottle shall last for 30 nights in approved use of 8 hours per night. How to use: 1. Remove the plastic cap of the liquid refill. 2. Screw the liquid refill bottle slowly into the pif paf device anti-clockwise. 3. Increase the level of protection by moving the slider. 4. Direct plug the machine and the indicator light will light when connected.