Feature:1. High Definition Display: The socket tester has a VA colour display with a high definition display, which allows the values to be seen clearly in dark environments.2. Wide Application: This socket tester is widely used in fire fighting scenarios, laboratories, factories and home use.3. Leakage Detection: The socket tester has the polarity detection of 3 hole power socket wiring and the protection function detection of leakage switches, enabling fast and accurate detection of wiring.4. Easy to Use: This socket tester is small, light and very easy to use, just install the batteries (not included) and you are ready to go.5. Safe and Durable: This socket tester is made of ABS material, which is safe and durable and has a long life span, and can effectively prevent electrical accidents from happening.Specification:Item Type: Outlet CheckerMaterial: ABSModel: ST05BPower Supply: 2 x AAA batteries (not included)Widely Used: Fire scenes, laboratories, factories, home use.Package List:1 xOutlet Checker