Detailed Answer
Three encoding methods: Fixed code: each button maps to a fixed code word — simple but easy to copy; Rolling code: the code word changes with each transmission (rolls), cannot be replayed or copied — highest security; Learning code: the receiver learns the transmitter's code word (one-key pairing), making replacement easy. The LIDER LD series uses rolling code + learning code; XINGJIA offers fixed/rolling selectable. For high-security scenarios (anti-hacking), choose rolling code.
| Fixed | Simple / easy to copy |
| Rolling | Copy-proof / secure |
| Learning | Easy replacement |
Note:Choose rolling code products if you need anti-misoperation/anti-hacking.