Voltage Detector Alert Type Light Built-In Flashlight Yes CAT Safety Rating CAT IV 600V Display Type No Display Maximum AC Voltage Measured 600 V Non-Contact Yes Test Connection Type Probe Tip Features Auto-Power Off After 5 Minutes of Inactivity for Increased Battery Life Green LED Indicates Tester is Ready for Use Power Source Battery Auto Power Off Yes Battery Size AAA Calibration Frequency 50 to 60 Hz Display Screen Type No Display