Lately there are many postings regarding error code displayed on Bels detector. To make good repair Bels are charging US$60 to $85. Somebody posted after repairs by Bels is good for a year. So ask yourself is worth to repair. Bels product is one the least dependable on the market. I will never buy should I know about it. Someone wrote the return rate of RX65 is 5% due to overheating problems. Why didn't Bels fixed this problem before selling to consumers and should openly recall back all the defect detectors and rectify on a goodwill basis.
So stay away from Bel products and don't be a fool throwing your hard-earned money into the drain.
PS: yet to hear from Roy regarding my email