on a beautiful and convenient device, unfortunately, the display was broken after a short time. we hope that one of the replacement device keeps longer. second shortcoming: Although the parent unit has two replaceable batteries, but they are cleverly behind a cover that is secured with a screw! so everyone will battery replacement if you'd like to sit out longer, for ordeal. a simple clip on the cover would certainly have done it well. third drawback: the baby's unit for some reason can not be loaded, although it has the same battery compartment and the same power supply. for camping equipment falling so well from. there for this mature develop innovative blunders - a star.