Field of application: personal grounding tester for daily testing of main grounding measures such as wrist straps or shoes with potential-free changeover contact for door opening Operation with 9 V battery (not included) or plug-in power supply  Main features: Connections for wrist strap: push button 10mm, push button 4mm, socket 4mmShoe electrode: 2 sockets 4mmDoor opener Western socket 6 pin RJ-12Measuring ranges:Wrist strap (HGB) 750k&! - 35M&!shoes individually 100k&! - 100M&!Shoes, series connection (hands-free mode) 200k&! - 200M&!Signals:Green LED = "OK", Red LED's and buzzer = "hi-Fail" or "Lo-Fail", Door opener = "OK "Operating modes:Single test OR , Double test "AND "HGB only, Shoes only, Series connection (Hands-free mode) Scope of delivery:Test device and shoe electrode with two separate electrode plates, Operating instructions.