The external antenna BFT AEL 433 increases the range of a remote control system. It is available at the operating frequency of 433.92 MHz. Suitable for most remote controls of sliding and swinging shutter mechanisms and for overhead garage doors. It is mainly installed outside metal shutters and metal garage doors as their metal surface prevents the signal from going out. It is also used in cases where, to have a good signal, the antenna needs to be in a different position from the remote control receiver or the control panel of the automation. The package includes an antenna, a mounting base, and 4 meters of coaxial cable (RG58) that can be cut to any desired length.