Product Details Each code that is transmitted by the remote is totally and randomly different to the last code transmitted. This prevents unwanted copying of the remote signal and cloning of the remote itself. CENTURION NOVA remote controls offers the same level of security as currently provided by leading brand automobile manufacturers for immobilising vehicle alarms and activating door locks. MAIN FEATURES: Durable silicone buttons made to last and last Sleek and stylish carbon look. 433Mhz operating frequency. Transmitters with one to four buttons. Transmitter quick and easy to open for battery replacement. Self-learning receivers with one, two and four channels. Receivers incorporate stable narrow band technology. Weatherproof housing for receiver.