1. Digital current and voltage detectors with LCD screens can display the measured values directly. 2. The function allows it to detect even in dark environments, easy and convenient to operate. 3. Non-contact test pen, sensitivity adjustable, high measurement accuracy. Four. With sound/light/simulation alarm mode, detection is faster and more efficient. Five. Supports automatic shutdown in 3 minutes without induction or operation, saving energy and power. specification: Condition: 100% Brand New Item type: Test Pen Material: ABS Color: Yellow + Black, Black + Red, Red + Black (Optional) AC voltage range: AC 12-1000V Frequency: 50/60HZ Alarm Mode: Sound/Light/Simulation Display: LCD screen :support Probe Shape: Flat Battery indicator: support Live Line and Neutral Line: Sound/Light/LCD Analog Display Non-contact sensitivity: adjustable Automatic Shutdown: Automatically shut down in 3 minutes without induction or operation. Operating power supply: 2 x 1.5 V AAA (battery not included) Operating temperature: 0-40 Storage temperature: 10-50 Altitude: less than 2000m/6561.7ft Package Size: Approx. 19.00x4.00x3.00cm/7.5x1.6x1.2in Package list: 1 x Yellow Test Pen (battery not included)