Structure: arrows bright polycarbonate opaque robust 35x48 mm or 67x67 mm (Standard ADA). Mounting: Front mounted on the plates of thickness between 1 and 3 mm. The protective cover of the electronic circuit is clipped on to the structure. Wiring: screw terminals or prewired (Pitagora System). Lighting: LED (red, green and white) 12/24V DC. Option: Gong 2 tone (up/down) with volume adjustable;. Interface card for connection to encoder Deum/Wardrobe Playboard. Former reference: FL-Frecce-CFM