The range is 1000 mêtres, so we tested leaving the transmitter (the baby) at home and going out with the receiver (the parents) to about 200 mêtres to the outside, result: it sizzles without stopping . (The canals were originally configured yet well). The plastic is of poor quality and it seems to have a toy in hand. Moreover, the receiver can not arise standing (which would see 2 or 3 mêtres eg if the signal is always good) and no, it must be placed horizontally, so one must be just above or next to view. This baby monitor is very complicated to configure, between the setting of the transmitter and receiver is the galley! Cerise (poisoned) on the cake, the device was delivered defective because the transformer which loads on the base transmitter does not work! (No bright red or green light). I do not understand the positive reviews for this product ... I WILL RETURN Illico.