Features:2 standard for your option: US standard/EU-standard.You can test the protection system to ensure the electrical safety of the home-.Perfect for protecting your safety from the risk of electric shock.Easy to judge: OK, open-ground, open neutral, reverse live-/neutral, reverse live-/ground, live open and reverse neutral live-.Compact-size, light weight and convenient to use.Specifications:Material: ABS-Size: approx 56x56x44mm/2.2x2.2x1.7-inchPlug-: US standard/EU-standardColor: white/blackNote:Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Package includes:1XSocket Tester