Big differences between the ET-732 and the ET-73
Main difference is the range. Even though the ET-73 claims to have a range of 100', you will not be able to receive a signal thru a solid door or wall. If you lose the signal, the receiver DOES NOT signal you, so your receiver will read the last received temp.
I can receive the signal from my ET-732 in every room of my house, including the basement.
It's a great deal at $29.99, but be aware of the differences!!!
TJ