Designed to test the protection system of your home, enhancing electrical safety and preventing electric shocks. Easy-to-read results indicate wiring conditions such as open-ground, open-neutral, and reverse wiring scenarios. Compact and design makes it easy to handle and use. RCD current: RCD 30mA Scope of application: 250V 50Hz/60HZ Product Name: Socket Polarity Tester Applicable socket: 10A/16A convertible universal Digital display screen: LCD voltage measurement Target audience: Household, Electricians, House Inspectors, etc Due to different batches, there may be differences in product appearance and printed text, which not affect use Voltage: AC220V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour:A:Black Material:ABS Package Contents: 1 x Socket Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.