The remote control transmitter is small hand held unit with 4 keys which works on 12V battery to give good range of operation. When a key is pressed, the IC is connected to power supply battery & it starts transmitting packets at 433 Mhz frequency consisting of its ID and Data byte which indicates which key was pressed. This information is used in remote control applications. Each transmitter has preprogrammed unique 32 bit ID set during manufacturing and cannot be changed. The receiver usually stores the transmitter ID in its memory before so receiver only responds to known transmitter IDs for secure applications. The RF part inside remote is SAW based 433 Mhz transmitter, which on be received by any433 Mhz type ASK RF Receiver.
This is an ASK Hybrid 433Mhz RF receiver module and is ideal for wireless control applications. The receiver module requires no external RF components except for the antenna. The super-regenerative design exhibits exceptional sensitivity.