The instrument features both audible and vibrating indication of voltage presence

The product has a round outlet diameter of 2

Further manufacturer information can be found on Horstmann's official product page for phase current sensors

Source: Product information verified on Intercable product page and manufacturer's product list (Intercable / WEITKOWITZ)

The product is supplied as a pre-assembled cable assembly with one plug input and two socket outputs (Plug (1) / Socket (2))

Forbindelsesstykke messing Ø7,2x50mm; f/glasfiberbånd Unit(s):Pcs The instrument features both audible. Splice for Glasfaserprofil 7,2 mm, Brass Material: Brass Length: 50 mm Diameter: 7. 2 mm Weight: 20 g