I have had three children and three monitors. This is by far the worst I've ever had. It doesn't hold a charge even when the ac adapter is being used. It also makes an annoying high pitched distant noise; very unnerving for those that are trying to get some sleep before their baby wakes again. I would have given it 0 stars if it wasn't for one cool feature; it doubles as a walkie talkie and you can speak to those close to the second receiver. The best monitor I've had was the Sony 900 mhz. The Summer video monitor works well too, but the antenna is fragile and not to be used around toddlers.