series buzzers are characterized by interrupted flashlight (volume 10cm / 80dB), electric current (15 - 20mA) and built-in screw wiring Features: 1) Basic spec code: 22mm 2) Rated voltage: DC / AC 24V, 36V, 48V, 110V, 127V; AC 220V, 380V 3) Available color: black, red 4) Protection grade: IP40, IP65 5) Meets international IEC947 standards 6) Meets European EN60947 standards