Binghamton, NY Nov 10, 2009 #7 I am not common with meter operation, but I would suspect that it needs to mail the switching voltages (13v for odd and 18v for even). And, if you have to see the opposite sats it really should send out the 22khz tone. Revenue https://sites.google.com/view/dienphucthinh/oc-siet-cap-chong-chay-no-dien-phuc-thinh