- Odourless protection.- Up to 30 nights (based on 12 hours use per night) long lasting mosquito & fly repellent, no need to change every day.- New "auto-timer" that switches off after 12 hours.- Revolutionary design of refill ensures no contact with product when changing refill.- Visible end-of-life indicator.Mortein Peaceful Nights uses advanced global technology. The design is discreet, compact and reliable. It has been specially formulated to effectively protect you and your family against mosquitoes and flies. (The level of protection may be affected by air changes, room layout and size.)