The 8WD4420-5AF made by Siemens is a signaler with lighting, meaning it is a device which, when activated, emits a light signal. It contains one blue LED light, which is powered by two voltage sources, 24VDC and 24VAC. It has an IP65 enclosure, meaning it is dust-tight and protected against water jets, and it is Ø70x65.5mm in size.