GUARDIAN model RX5 receiver. It receives using on frequency 303 MHz.
The warranty on the RX5 garage door receiver is 1 year from GUARDIAN.
The model is still available.
GUARDIAN model RX5 receiver instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
guardian_rx5_om.pdf
(0.08 MB in English) This requires Acrobat 10 or higher