This electric measuring instrument can check currency, driving license, official ID card, passport, money Voltage test pen with LED flashlight, it can be used even in an environment dark; 5 minutes without operation, it will turn off automatically, saving energy Electrical Tester-Voltage frequency can be distinguished by buzzer and LED indicator. Sound is loud enough to hear moderate equipment noise AC voltage detector powered by 2 x AA batteries, distinguish live and neutral wires with different frequencies of alarm sounds and LED indicators; voltage detection range 30-1000V AC Non-contact voltage detector-When the device close to the AC voltage is above the specified voltage range and does not touch the object under test, it will flash and beeps, and at the same time a beep and an LED indicate that the load for safety measures is sufficient Delivery quantity: 2 * Tester