Warm tips: This product is a dual-purpose instrument for measuring electricity and temperature. The temperature measurement function of this instrument is suitable for measuring the surface temperature of objects. This product is not suitable for measuring temperature of body surface,Forehead,Baby ! To avoid poible electric shock or personal injury. Please use the tester stictly acording to this instruction. or else The protection functions provided may be afected. Do not use if the display screen is not lit Before use, conduct itial test on the power source with known live charge to ensure that the produt is in good working condition. When using this tester even if there is no sound-light alarm there may still be voltage The tester simply indicates the effective voltage when there is an ac voltage generating a ufcienty strong electrostatic field. If the field strength is very low. the tester may not detect it. The tester may be afected by the fllowig factors including but not limited to: shielded wire/cable. thickne and type of insulation layer, distance from voltage soure, safety insulation layer, socket design differences, etc. Do not use the tester if it is damaged or unable to work properly. Before use, check the probe specifically for cracks or fractures.If there is any problem, please send the tester for repair in time. Do not apply more than the rated voltage marked on the tester. When testing the voltage above 36V ac take special care to avoid the risk of electric shock. Comply with local and national safey regulations. Use appropriate protective equipment as required by local or national authorities Product parameters: Temperature: Temperature measurement range:-30C -250 Resolution:0.1/0.1 Accuracy grade:2%or2'C Response time response time < 1 second Distance ratio: (D:S) 1:1 Emiivity: 0.95 NCV: Measuring range: 12~1000AC Measure the frequency: 50Hz/60Hz Safety standard:CAT. 1000V /CAT 600.CE Product size: 152x 25 x 28mm Battery:2x AAA 1.5v(delivery not include) Operation instructions: 1. Unscew the battery cover at the end of the test pen and install the battery correctly according to the mark. 2. Pre any IR key (temperature measurement) or NCV(induction electricity measurement)Hear a beep and light the backlight into measurement mode. 3. Pre the IR after startup,continuous pre IR can be converted into two or mode, users can set according to the using habits. 4. Pre theIR key to start the machine, and then the display screen will show the number and the upper left corner HOLD the instrument is in lock mode. When measuring temperature, pre and hold the IR key without releasing it. When SCAN flashes on the display screen, the tester enters the temperature measurement mode. When the IR key is released after temperature measurement, the parameters are automatically locked. 5. When there is no operation for temperature measurement, the instrument will automatically shut down after 2 minutes. 6.When preing the NCV key, the display screen will display the symbol ncu when there is no signal. When the instrument detects the AC voltage signal, the red warning light and buzzer on the front end will display rhythmic red light flashes and sound changes according to the voltage. The three analogue bars(- - - ) on the display screen will also show 1-3 obvious changes according to the voltage. 7. The instrument is equipped with flashlight lighting function. Long pre the NCV key for about 2 seconds It can be turned on and off. 8. When the instrument is not used for a long time, please remove the battery.