Quasar Electronics30A16-Tx - 4-Channel 434MHz Transmitter Fob 4312RSA(A1)http://www.quasarelectronics.co.uk/media/ecom/prodsm/30a16-tx_small.jpg4-Button Automicro 434MHz Transmitter / Receiver modules with rolling code making it close-to-impossible to electronically crack. Click Product Title for full details.Electronics > Circuit Components > Printed Circuit Boards > Development Boardsquasar-diy-a16-tx30A16-Tx19.96Quasar Electronics Limitednewin stockhttp://www.quasarelectronics.co.uk/Item/30a16-tx-4-button-434mhz-rolling-code-keyfob-transmitter
4-Button Automicro 434MHz Transmitter / Receiver modules with rolling code making it close-to-impossible to electronically crack. Used in our kit 3180 and 3181 but available here as just the Tx / Rx units for you to incorporate into your own circuits.
Picture shows the pre-built, aligned and tested keychain transmitter (left) and receiver module (right).
Whether you want to control a garage door or gate, a car and/or home alarm, or perhaps remotely turn lights or anything else on or off, this high-security system is just what you're looking for! 40 metre range (line of sight).