OWON B33+ Digital BT Multimeter with Offline Record 3999 Counts Auto-ranging Electrical Tester with Backlight LCD Screen AC DC Voltage Current Detector Temperature Measuring Multifunction Voltage Meter Capacitance Continuity Resistance Frequency Testing This multifunctional tool features the function of multimeter, temperature meter and offline recorder. With backlight LCD screen for easy reading and comfortable grip for easy operation, it can be widely used in electrical testing, automotive repairing, industrial temperature measuring, etc. Features: 3-in-1 Multifunctional Meter -- BT multimeter, temperature meter, offline recorder. Equipped with 2 measuring pens, 2 crocodile clips and a K-type thermocouple, easy to install and use. The multimeter can be widely used in electrical testing, automotive repairing, industrial temperature measuring, etc. BT Function & Offline Record -- It supports BT function in smartphone APP and PC software, and is compatible with Android 4.3 and above/ iOS 7.0 and above/ Wins. Offline record function allows you to record for a long time without staff on duty, while reducing BT consumption to conserve the battery power of the multimeter. And multiple groups of data can be recorded at the same time. Auto Ranging/ Manual Selection -- High accuracy, wide measuring range, 3999 counts, auto recognition or manual selection of the range for more convenient use. It can test AC voltage, DC voltage, AC current, DC current, resistance, capacitance, diode, frequency, continuity and temperature. Temperature Measurement -- Comes with a K-type thermocouple, this smart meter features -50~400℃ (-58~752℉) wide measuring range for industrial temperature measuring, which has quick response and brings accurate data. Backlight LCD Screen & Alarm Buzzer -- Data hold function and clear LCD screen with backlight greatly enhances the reading experience and makes it easy to read. With alarm buzzer for warning in different sistuations, such as before auto power off, in exceeding the measuring range, before the BT function turing off, etc. Battery Operated & Portable to Carry -- Powered by 2 AA batteries (not included), auto power off in about 15 minutes to save power. Ergonomic design perfectly fits your palm; foldable bracket for easily put in the desktop. Concise appearance, portable and lightweight, easy to carry. Note: 1. Please read the user manual carefully before use. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Blue & Black Material: ABS Screen: Digital LCD Screen with Backlight True RMS: No Counts: 3999 Max. Voltage: 1000V DC, 750V AC Max. Current: 20A DC or AC Max. Capacitance: 4000μF Max. Resistance: 60MΩ Max. Frequency: 9.999MHz Temperature Measuring Range: -50~400℃/ -58~752℉ Auto Shutdown: about 15min BT Version: Support 4.0 OS: Compatible with Android 4.3 and above/ iOS 7.0 and above Power Supply: 2 * 1.5V AA Battery (NOT included) Operating Height: Max. 3000m Operating Environment: 0~40℃ Storage Environment: -10~60℃ Humidity: ≤80%RH Item Size: Approx. 185 * 85 * 35mm / 7.28 * 3.35 * 1.38in Item Weight: Approx. 287g / 10.12oz Package Size: Approx. 21 * 13.5 * 5.5cm / 8.27 * 5.31 * 2.17in Package Weight: Approx. 500g / 1.10lbs Package List: 1 * Multimeter 2 * Measuring Pen 2 * Crocodile Clip 1 * K-type Thermocouple 1 * User Manual (English)