<https://fireshop.co.id/p/manual-push-button-guardall-led-technology-3/#product>
<http://schema.org/description>
"Operation Voltage\r\n24 V DC\r\n\r\n\r\nMax.Current\r\n1 A at 24 v DC\r\n\r\n\r\nContact Resistance\r\n≤ 0.2 Ω\r\n\r\n\r\nTemperature Range\r\n-10°C ~ +50°C\r\n\r\n\r\nMax. Relative Humidity\r\n≤ 93 RH ± 2%\r\n\r\n\r\nDimension\r\n87 x 87 x 51 mm"
<https://fireshop.co.id/p/manual-push-button-guardall-led-technology-3/>