Klein Tools NCVT-5A Dual-Range Non-Contact Voltage Tester with integrated laser pointer detects 70 to 1000V AC (Mode 1) or 12 to 1000V AC Mode 2). Audible alerts increase in frequency as voltage level rises or as you move closer to the source. Laser operates independently or with voltage detection. Class IIIa laser (21CFR1040.10 and 1040.11 - IEC60825-1 Ed.3) with an output power of less than or equal to 5mW at 630-670nm. CAT IV 1000V safety rating.Features Delivers simultaneous visual and audible voltage indicators when AC voltage is detected Class IIIa laser (21CFR1040.10 and 1040.11 - IEC60825-1 Ed.3) with an output power of less than or equal to 5mW at 630-670nm Screw-thread battery cap US Patent No. D750985 CAT IV 1000V safety rating Simple to use intuitive interface is easy to change between voltage detection ranges and easy to determine the currently active range Auto Power-Off conserves battery life Audible voltage indicator beeps at a greater frequency the higher the voltage that is sensed, or the closer to the voltage source Voltage Tester provides non-contact determination of AC voltage in cables, cords, circuit breakers, switches, outlets and wires, as well as AC voltage in security, entertainment, communications, environmental control and irrigation systems Lightweight, compact tool with pocket clip provides convenient storage and quick access Built to withstand a 9.9-Foot / 3-meter drop Dual-range testing: select 12 to 1000V AC which is perfect for low voltage systems such as doorbells, environmental control or irrigation systems, or select 70 to 1000V AC which is perfect for detecting systems such as electrical mains supply Integrated High Strength Red Laser Pointer, Dual Range Tester (70-1000V; 12V-1000V) AC Voltage Detection, Simultaneous Visual and Audible Voltage Indicators in the Presence of AC Voltage; US Patent No. D750985 Bright integrated laser pointer for identifying objects of interest at distance on the jobsite Warnings Never assume neutral or ground wires are de-energized. Neutrals in multi-wire branch circuits may be energized when disconnected and must be retested before handling. Read, understand, and follow all instructions, cautions and warnings attached to and/or packed with all test and measurement devices before each use. Use of this tester in any way other than that specified by the manufacturer can impair safe operation, resulting in severe injury or death LASER RADIATION, Class IIIa laser. DO NOT direct laser beam into eyes, DO NOT stare into the beam, or DO NOT view directly with optical instruments as this can cause severe and permanent eye damage. Voltage: 12 1000V AC; 70 1000V AC Frequency: 50 to 500 Hz Testing Mode: Dual Range (Mode 1 and Mode 2) Voltage Detection Type: Non-Contact Safety Standard: CAT IV 1000V; Laser: Class IIIa, 630-670nm, Max Power