Universal external antenna 433,92 MHz  

Can be fastened to the wall or directly on the vertical pillar

comes with 5m long cable and fixing bracket

It's recommended in case the control box of the opener is  installed far from the gate/door or in case there are barriers to the radio transmission.

Caution: the use of external antenna makes the electronic board  more vulnerable to short circuits caused by ESD.  We therefore suggest to evaluate, as an alternative, the use of an external radio receiver.