All in one hidden cameras provide a number of benefits. For one thing, they can be placed discretely. This is important if you are trying to monitor someone without their knowledge. For instance, you may want to keep an eye on your housekeeper, handyman or anyone else who has access to your home while you are away. Hidden cameras can also help you verify that your pets and children are being well cared for. By placing a nanny cam in your home you can get a first-hand look at how your nanny or babysitter interacts with your children and pets while you are out.