Instruct: Classify a given review into positive or negative sentiment.
Query: Extremely limited range

This is a useful idea which needs work. The alarm portion seems to work as advertised. The voice version is useful to know which alarm was triggered. The problem is very limited range on the linking.The wireless range of the alarm is much less than Z-Wave, Bluetooth or wireless alarm devices, wifi, 900mhz, 2.4, 5.8 or DECT phones. It is comparable to a 1970s kids walkie talkie. Pretty dismal. I had to move the alarms several times in order to get a solid link between two bedrooms separated by a bathroom, the same problem between floors even when the alarms were nearly on top of one another. This is in a stick frame house without foil insulation. The linking feature is not very useful if they have to be within 10 feet of each other.You must test each alarm in the exact installation location with the other alarms in their locations, not just close in the room. This a pretty difficult feat when you have multiple alarms.