Size: 101X66X52mm, package contains only one mosquito repellent Mouse Insert, Ultrasonic Mouse Repeller with Night Light, 360 Degree Pulsing Sonic Mouse Repeller for Mice, Spiders, Rats and Cockroaches 40 Ultrasonic Frequencies: The ultrasonic mouse insert scares away flies and generates 40 changes. Ultrasonic frequencies are random, causing discomfort and annoyance. to rodents and other animals. Easy to install: You can plug in this indoor ultrasonic rodent killer and adjust it to your needs. It can be placed on the floor or hung on the wall. DURABLE AND SAFE: Insert these rodent repellents indoors and enjoy a rat-free environment. They are made of strong ABS flame retardant material that can withstand daily use and won't break easily. They are also safe to use and environmentally friendly. EASY TO USE: With this addon you can enjoy a house without mice, cockroaches, spiders, flies. It emits high frequency sound waves to keep them away from your kitchen, basement, garage, attic and storage.