STILO 6025Description 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