CLEANRTH PCS101 Three-Stage ComboSonic Squirrel Repeller | Squirrel Control This is an AUDIBLE unit specifically designed for DOMINATION of squirrel control. About the Sound: It's quiet yet noticeable when you're nearby/in the same room, but it's not noticeable when you're in a different room Single vertical speaker emits squirrel-repelling sounds 180 straight up Dual front speakers emit 260 of widespread horizontal coverage Three-stages of squirrel dominating options, including Sonic, Ultrasonic, and ComboSonic! Designed to be used indoors or outdoors (protected from the rain)