This PCB module is a 2 channel general purpose 433.92MHz Keeloq (TM) rolling code transmitter. Powered from a 12VDC source CH1 and CH2 signals are initiated by grounding (-) one of the input terminals. This would usually be through a momentary action switch or signal from an alarm panel for example. If the input is held at GND, after 30 seconds transmission will cease automatically as required by law. The onboard helical antenna is adequate for most applications however it can be replaced by other antennas for improved performance. This transmitter is supplied in our PTP-TX/RX Kit along with a HCR-224 receiver.
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