Feature:1. Multiple Gears Option: This digital insulation tester has multiple gear options for quick detection and key switching. It can select 250V, 500V, 1000V, 2.5KV, 5KV, 10KV for testing according to needs2. Secure Measurement: This insulation resistance tester automatically releases charges after measuring the insulation resistance of the load, providing dual guard to ensure secure and reliable measurement3. Data Locking and Storage: After the measurement is completed, short press the MEM key to lock the current displayed data and automatically number and store it. Supports up to 500 sets of data storage4. USB Interface: This high voltage megohmmeter features a USB interface, supports software monitoring, and can upload stored data to a computer for saving and printing, efficient and practical5. Alarm Function: When the measured voltage value is greater than the alarm set value or the insulation resistance value is less than the alarm crisis set value, the instrument flashes and emits beep alarm soundSpecification:Item Type: High Voltage MegohmmeterMaterial: ABSBattery: 1 x Polymer Battery 2500mAh (built in battery)DC Voltage Measurement Range: DC 0.0V-1000V, Resolution: 1.5%rdg3dgt, Accuracy: 0.1VAC Voltage Measurement Range: AC 0.0V-750V, Resolution: 1.5%rdg3dgt, Accuracy: 0.1VFunction: Insulation Resistance Test, Voltage TestRated Voltage: 250V, 500V, 1000V, 2500V, 5000V, 10KVMeasurement Voltage (V): Rated Voltage x (110%)Insulation Resistance Range: 0.01M-3000G, Resolution: 0.01MDC Voltage Range: 0-1000V, Resolution: 0.1VAC Voltage Range: 0-750V, Resolution: 0.1VOutput Short Circuit Current: 5mA (10KV)Absorption Ratio Measurement: YesPolarization Index Measurement: YesBacklight: Controllable Gray White Screen Backlight, Suitable for Use in Dim PlacesDisplay Mode: 4 Digit Extra Large LCD Display, Gray White Screen BacklightUSB Interface: With USB Interface, Software Monitoring, Data Storage Can be Uploaded to Computer, Save PrintTest Line: High Voltage Rod Red 3 meters, High Voltage Test Line Black 1.5 meters, Green Line 1.5 metersData Storage: 500 Sets, Blinking FULL Symbol Indicates Storage is FullData Query Function: MR Symbol Displays Overflow DisplayOverload Overflow Function: OL Symbol DisplaysAlarm Function: Alarm Prompt When Measured Value Does Not Exceed Alarm Set ValuePower Consumption: Standby: 30mA Maximum, Backlight On: 42mA Maximum, Measurement: 300mA Maximum.Package List:1 x Tester1 x Adapter3 x Test Lines2 x Cloth Tapes1 x USB Cable1 x CD2 x Keys1 x User Manual1 x Aluminum Case