Detect bedbugs before it’s too late! This monitor is designed to slide under mattress or in fact ANYWHERE there is a need to detect bedbugs as a means of monitoring for the first signs of an infestation. Bedbugs are attracted to the textured base of the monitors. They explore the base and are trapped in the adhesive formulated for bedbugs and insects. The clear window allows for easy inspection. They can easily slide between the mattress and box spring. Place under four corners of mattress. They can also be placed under couch cushions and in other upholstered furniture, under crib mattress, inside luggage, in cars and under car floor mats, in and around cubbies/lockers at schools, gym or office and along baseboards. Remember! Early Detection is the Key!