These Tomy baby monitors will give you reassurance while your baby is sleeping. The monitors come with 120-channel selection and a privacy feature. The thing I find great about these monitors is that you have a two-way talk back system that allows you to talk to your baby with out going to them. On the parent unit, you will have a sound sensitive light display and a vibrating alert system to let you know how your child is. The range these monitors go to is 300m. These Tomy monitors come with two mains adaptors and for portable use you will need four x AAA batteries.