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