Electrical Supplies
Megger 1007-157 SP5 Remote Switch Probe for 1710/1720/1730 Multifunction Testers
Special 2-pin plug on instrument end Probe with switch in handle test end Conforms to CAT IV 600 V Silicone lead 1.3 m long
https://www.bizrate.co.uk/electricalsupplies/megger-1007-157-sp5-remote-switch-oid12100898964.html