Also, The RECORD FUNCTION will back up and begin recording the time amount you have set in your REPLAY DURATION and begin recording. Say you hear something and REALLY wish you had it recorded, if it has not been over that amount of time in your Replay Duration it can be recorded. To set your Replay Duration: Menu>Settings>Replay Options>Set Replay Duration>pick how many seconds you wish to record...30 seconds to 240 seconds (3 minutes). The RECORD function is a GREAT option! If you don't try these extra options on your scanners you won't ever realize the full potential of your scanner. Yes, there is a little wear and tear on your sd card but buy your sd cards online and keep a back-up or know your computer has the Sentinel programming,