This Onpow signal tower pushbutton switch is a new product. Alarm indicator Power Source: AC:6.3V,12V,24V,48V,110V,220V DC:6.3V,12V,24V Voltage Range: voltage fluctuation<±20% Count Range:0-99999(JDM-5H) 0-999999(JDM-6H) Count Speed:<50 times/s Reset Mode: panel pushbutton reset Use Temperature:-20 50°C Power Dissipation:<2VA