This is a professional voltage tester kit. Made from , it is strong and durable for long time use. Suitable for alternating current . With digital display, it is convenient and easy to operate. Built-in sensor, when the nearby voltage is detected, the light will flash and an alarm will sound. Features -Color: Black -Material: ABS, LCD. -Size: About 17.05X2.54X2.20cm/6.70X1.00X0.86in. -Application range: 12-1000V. - Battery: 2 x button batteries(Included). - Auto power : No operation, no sensing will shut down automatically in about 5 minutes. - voltage range can be switched between sensitivity for different circumstances. - Non-contact detects the live/null line and alerts you with a beeping sound and flashes. - Quickly checks shorts or broken circuits in all types of electrical devices. - The clear LCD screen makes you catch the values , and flashlight enables good visibility in the low-light or . Package list: 2 Sets x Voltage Kit