Piezo button, vandal-proof Dimensions ? x H: 26 x 16.2 mm Temperature range: -40 ... +85 °C Colour: Black Contacts: 1 Make Contact (NO) Housing Material: Anodized / Aluminium (Al) Illumination: No Protection rating: IP67 Switching type: Impulse Function, Piezo Principle Termination type: Soldering Connection Flush-mounted ?: 22.1 mm Rated voltage: 42 VAC / 60 VDC