https://mspindy.com/technical-guides/22mm-industrial-alarms-with-led-lights-product-application-guide/
22mm Industrial Alarms with LED Lights (Product Application Guide) - Mallory
Notes: 16 Volt units are DC Only; 28 Volt units can be DC or AC/DC; 120 Volt units are AC Only Multi-tone units are 28 Vdc Only Sound Types Continuous Tone:...
with led lightsproduct application guideindustrialalarmsmallory