Klein Tools MM450 Multimeter is a TRMS auto-ranging slim multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. It features a high visibility, reverse contrast display with an optical sensor to automatically optimize viewing in dark or bright ambient light. The slim profile of the MM450 makes this meter almost the size of a cell phone and it conveniently fits into most pockets. The MM450 features the same quality leads you have come to expect from the Digital Multimeter line at Klein Tools. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features.Warnings Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged. Before each use verify meter operation by measuring a known voltage or current. Read, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use. Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed. Features Slim profile allows multimeter to conveniently fit into most pockets CAT III 600V safety rating Low battery indicator and easily accessible battery and fuse compartment For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations Slim Profile; Lead-Alert; High-Visibility Display with Optical Sensor; Auto-Range; Min/Max Measurements; Auto Power-Off; Data-Hold Multimeter with automatic ranging true root mean square (TRMS) technology for increased accuracy Durable meter built to withstand a 6.6-Foot (2 m) drop Measures up to 600V AC/DC voltage, 10A AC/DC current and 50 MΩ resistance, continuity, temperature, capacitance, frequency, duty-cycle, and test diodes Includes carrying pouch, safety rated CAT III 1000V/CAT IV 600V test leads, thermocouple with adapter and 2 x AAA batteries High visibility, reverse contrast display with automatic backlight adjustment Lead-Alert protection with LEDs for test lead placement Voltage: 600V AC/DC Current: 10A AC/DC Resistance: 50Ma9 Temperature Range: -40b0 to 1832b0F (-40b0 to 1000b0C) Capacitance: 400 b5F Frequency Range: 1 Hz to 50 KHz Safety Rating: CAT III 600V; CE and UKCA Certified Display Type: 4000 Count LCD Reverse Contrast with Optical Sensor Drop Protection: 6.6 ft (2 m) Overall Length: 6.5 in (16.5 cm) Overall Width: 3.14 in (8 cm) Overall Height: 1.09 in (2.8 cm) Weight: 0.575 lbs Material: ABS, Electrical Components Battery: 2 x AAA Auto Ranging: Yes Backlight: Automatic adjustment with optical sensor Data Hold: Yes Auto Power-Off: Yes Lead Alert: LEDs for test lead placement DownloadsBrochure 1Video DownloadSpec SheetSafety Data SheetBrochure 2InstructionsMM450V2_Instructions.pdf