The 1099-50 and the 3028-50 are two auto sensing Multi-Code or Stanley compatible format gate receivers. They eliminate any chance of damage to either the gate operator or themselves from running off the wrong voltage. Nearly all gate orperators offer either 24 or 12 volts AC or DC as accessory power. Because these two receivers are auto sensing, each recognizes the gate operator's correct voltage. As a result, installers can be assured of always having the correct model gate receiver on the truck. The two receivers can operate from 12-30 volts AC or 10.5-30 volts DC and are normally powered from the gate operator. Their relay contact(s) are rated at 30 VAC/DC up to 5 Amps. The two receivers both support transmitters that use the Multi-Code format (300 MHz), as well as the Stanley compatible (310 MHz) format. Both formats support 1,024 system codes for the 1099-50 and 512 system codes for the 3028-50 (system codes are easy to set via dip switches). The 1099-50 has a single relay and replaces three different Multi-Code gate receivers, the 1099-30, the 1099-40, and the 1099-31. It is designed for use with automatic gate operators or systems where a remote antenna is needed. The 3028-50 comes with two relays and replaces Linear models 3028-01 and 2031-02, both of which were housed in metal enclosures. The 3028-50 comes in a plastic housing that is easy to work with. It will operate two gates, one gate and an obstacle sensor, or channel one can open the gate and channel two can close the gate.