. PRODUCT SPECIFICATION 2.1 SCOPE OF REMOTE KEYLESS ENTRY SYSTEM 21.1 KEY PART : TRANSMITTER is inside of the REMOTE KEY, and it sends the rolling code to the RECEIVER by radio frequency. 2.1.2 RECEIVER : It receives the ROLLING CODE and decodes that, thereafter RECEIVER drives the actuator. 2.2 SPECIFICATIONS 2.2.1 TRANSMITTER 2.2.2 ITEM SPECIFICATION Rated supply voltage DC 3V Operating voltage range DC 2.5 ~ 3.