This baby monitor is very simple in what it offers, but it is thereby also very simple to use: other products Tomy baby monitors are more complete, but we chose this one for its low wave emission (about 40.600 MHz). Namely, the on / off button on both units (parent and baby) illuminates very strongly, which is not convenient at night, and the parent unit emits a continuous crackle ... In small positive note, hears - and sees with LEDs - great when baby calls (you can even adjust the intensity of the volume as needed) and the pilot light, which can turn on and off, and it very easily. In summary, a very good product, reliable, sober but respecting the health of our children ... ... And as usual delivery in top speed!