Another difference between this product and its overall more impressive predecessors on this list is the strictly ultrasonic operation principle that doesn't incorporate electromagnetic waves. Since ultrasonic waves are unable to penetrate walls and solid objects, you'll have to install the repellents inside the room. The ARIBIO High Power Plug-in Pest Control system works as a powerful rodent and insect repellant. Unlike the other electronic pest repellers that we have reviewed here, just one device is needed for the whole house, which provides total comfort along with the absence of annoying pests. Thanks to its high-quality assembly, you are also guaranteed a long service life for the device, which means that you won't have to look for any kind of replacement, saving you tons of money compared to most other pest control methods. One of the great things about this set of 5 devices is that each device is quite small and compact, making it easy to install just about anywhere, even when space is at a premium. Despite the small size, though, the bionic waves that each device emits render pests unable to handle the high frequencies while also being perfectly safe for both people and pets. You don't have to worry about any harmful or dangerous chemicals while using this pest repelled, which is a huge advantage over traditional means of getting rid of pests. We wouldn't necessarily emphasise that "bedroom" part though because the repellers are relatively loud compared to every other model within this lineup. As stated before, instead of needing a set of 5 or 6 different devices, the ARIBIO High Power Plug-in Pest Control system works with just one device, providing coverage for the average home without needing any additional equipment. The device itself, despite its high power, is actually quite compact, which makes it easy to place just about anywhere.