This was purchased to be used with a senior with dementia, we needed to hear when she woke or called us. 16 hour initial charge seemed long for a charge that doesn't last more then a day.
It seems to go out of range and neither part has been moved from where they were placed. We leave the parent 1 in the living room which is a direct line to the bedroom, same floor. The lady who has the child end in the room with her can't always be heard, she can't reach it so we know she's not moving/hiding it.
It claims to have a 990 ft. range, I can't see it working near that distance as 50 ft approximately it doesn't always work.