433 MHz Remote Control: Easy to copy and ready in minutes.Copy any fixed code remote control, avoid replacing the specified remote control. 4-in-1 Remote Control Duplicator: Each matching letter can open a different remote control key.You can use delete and restore operations.The device can clone up to 4 remote control keys from the same or different remote controls. High Security: One-to-one key copy, each key password is stored separately and can be used repeatedly a million times.The seamless infrared connection is secured by data encryption. Creative Design: This device transmits signals to duplicate your existing remote controls, so you will always have a duplicate remote or key available in case you lose the original. Universal:The duplicator is the simplest and most cost-effective way.Suitable for remote control of electric gates, car keys, telescopic doors, garage doors, motors, curtains, etc.