This document summarizes the features of the ALKcar 4 in 1 Car Remote Control Decoder, which is a wireless remote control detector and duplicator. It can decode various remote controls within 0.1 seconds for 4 fixed frequencies. It has features such as receiving and storing remote control signals, emitting stored signals, deleting stored signals, and displaying information about remote control chips. It is intended for use by car repair services, garages, and workshops to detect and duplicate remote control signals.