In transmitting devices such as garage door operators, the values of V1 and V2 depend on the type and quality of {HEAD ~ equipment} used to receive {TAIL ~ signals} from the transmitting device and open the garage door 
used to receive
In transmitting devices such as garage door operators , the values of V1 and V2 depend on the type and quality of { HEAD ~ equipment } used to receive { TAIL ~ signals } from the transmitting device and open the garage door
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH