UNI-T UT13B AC Voltage Detectors Adjustable Sensitivity 50-1000ACV Features:Adjustable Sensitivity: Beeper Indicattion: Flashing LED light Indication: Vibration Indication: Low Battery Indication: 1.0VNCV Detection By: Auto SenseSpecifications:Model: UT13BAC Voltage (V): 50 V~ 1000 VFrequency (Hz): 50/60HzGeneral Characteristic:Power: 1.5V Battery (R03)1(not included)Product Colour: Red and GreyProduct Net Weight: 29g / 1ozProduct Size: 15 * 3 * 2cm / 5.9 * 1.2 * 0.8inPackage Size: 23 * 10 * 2cm / 9.1 * 3.9 * 0.8inPackage Weight: 63g / 2.2ozPackage list:1 * UNI-T UT13B AC Voltage Detectors1 * English User Manual