PRODUCT SPECIFICATIONS Size: 90mm * 53mm * 44mm Color: blue and white USE TIME Ultrasonic repellents usually have need 3-4 weeks to take effect: Week 1: The incubation period - Starting to have an impact Week 2: The period of effect - interference continues Week 3: Critical period - Preventing possible survival Week 4: Stable period - Preventing the return of mice HOW TO USE Place the object 80-120cm above the ground. Just plug our electronic mouse repellent into the hole and he’ll do the rest. It must be positioned vertically with respect to the floor and you must plug it in. NOTE the ultrasonic waves are not able to act on the walls. Consequently, even if our product works perfectly, if you are facing a widespread infestation, we recommend placing a repellent in every room!