Piezo switch Dimensions ? x H: 28 x 24 mm Temperature range: -40 ... +75 °C Colour: Natural Aluminum Contacts: 1 Make Contact (NO) Housing Material: Aluminium (Al) Illumination: Yes Light colour: Ring / Yellow Protection rating: IP68 Switching type: Latching Function Termination type: Stranded Wires, 300 mm Flush-mounted ?: 22.2 mm Illumination Supply Voltage: 24 VAC/DC Rated voltage: 24 VAC/DC