This is the tested best, made in the USA, Professional Hand-Held high frequency instrument that includes Mushroom Glass Electrode, Rake/Comb Glass Electrode, Straight Glass Electrode, and Vinyl Insulator Cap. Available in USA, UK or Australian/New Zealand power versions. Comes complete with the proper power cord and plug for your country. Please specify your country of use in the drop-down option list on the next MORE INFO/order page.