It can be used for voltage indication, single pole voltage detection, continuity test and phase rotation test_x005F_x000D_For AC voltage, the value is indicated by LEDs, the + and - LEDs are illuminated and buzzer is audible_x005F_x000D_For DC voltage, the value is displayed on the LEDs and the positive LED is illuminated. If the polarity is reversed the buzzer will sound_x005F_x000D_The single pole test is intended only as a quick check_x005F_x000D_The meter is powered by 1.5V AAA batteries (batteries not included)_x005F_x000D_Specifications:_x005F_x000D_Voltage:_x005F_x000D_Voltage Display: 12-690V AC/DC _x005F_x000D_LED Resolution: 12, 24, 50, 120, 230, 400, 690 _x005F_x000D_Voltage Detection: Automatic _x005F_x000D_Acoustic Signal: AC Voltage - DC Voltage _x005F_x000D_Polarity Detection: Full Range _x005F_x000D_Response Time: LED 0.1s _x005F_x000D_Frequency Range: 0-400Hz _x005F_x000D_Peak Current: Is0.3A/Is(after 5s)3.5mA _x005F_x000D_Operation Time: 30s _x005F_x000D_Recovery Time: 10min _x005F_x000D_Single Pole: _x005F_x000D_Voltage Range: 100-690V AC _x005F_x000D_Frequency Range: 50-400Hz _x005F_x000D_Continuity Measuring Range: 0-400Kohm _x005F_x000D_Phase Rotation Test: _x005F_x000D_Voltage Range: 100-690V _x005F_x000D_Frequency: 45-65Hz _x005F_x000D_Over Voltage: 690V AC/DC _x005F_x000D_Power Supply: 2 x 1.5V AAA Batteries(not included) _x005F_x000D_Item Size: 25.5 x 5 x 2cm_x005F_x000D_Item Weight: 195g_x005F_x000D_Package included:_x005F_x000D_1 x UNI-T UT15B Multifunctional Automatic Voltage Tester Detector Single Pole Detection Continuity Test