Metrel’s tester, the Gamma PAT, is the only tester available that comes with a Calibration Checkbox. This aids your compliance with the IEE codes of practice by allowing you to check the accuracy of the portable appliance tester. Product Details GammaPAT WM1 500 pass labels wm7 250 fail labels wm12 250 Cable wrap labels PAT Register Metrel GammaPAT MI3311 Carry Case Metrel GammaPAT MI3311 Instruction Manual Earth Bond Lead with probe and clip 230V to IEC lead 6 rechargeable batteries and lead 3 year warranty The two different modes of operation allow the choice of either, Class I, Class II or IEC lead/extension-lead test, in simple mode, and calculating the resistance of long cables in auto mode. The Gamma PAT has the upgrade kit included, allowing you to download the testing information to a computer. This tester is battery powered with an inbuilt charger and has a Green and Red LED light system making it very easy to use in difficult testing areas.