Separate units ø 22: Heads IP 66 - IP 69K Characteristics (p. 98) > USB INTERFACE 3.0 TYPE A/A CONNECTION 21 19.2 Degree of protection: IP 65 Cat. No. USB interface 3.0 type A/A connection USB class: 3.0 (backward compatible with USB class 2.0) L21VB03 Recommended fixing tool: Tightening flat wrench size 26 mm L21VB03 > AUDIBLE WARNING BUZZERS 37.2 11.6 29.7 Degree of protection: IP 66, IP 69K Cat. No. 24 V AC/DC Buzzer pulse or continuous sound 130 V AC/DC Buzzer pulse or continuous sound 230 V AC/DC Buzzer pulse or continuous sound L22VA03L L22VA03M L22VA03H Recommended fixing tool: Tightening flat wrench size 26 mm L22VA03L Catalogue No. in bold: normally in stock at distribution outlets 38