Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work unless you buy another Transceiver

I bought this Screw-in "Socket Rocket" and the "Eagle Eye" motion detector, but apparently I now need to spend another $20 for a transceiver to make this system work. The info available did not make this clear when I initially ordered these components, so be aware before you order! I'm giving it 2 stars for that lack of information and the additional costs that are now incurred to find out if it works.