technical data:symbol: yt-28320series: grdmaterial: absapplication: electricaloperating temperature range: 0~40 °cstorage temperature: -10 ~ +50 °cpower supply: batterybattery type: 2x1.5v aaalength: 165 mmvoltage: 3 v d.c.switch: yesdisplay type: lcdvoltage - induction method: 12-1000 v a.c.continuity test: yesconduction test: nosensitivity adjustment: yesled backlight: yesled indicators: yesfrequency of measured voltage: 50/60 hzflashlight function: nolow battery indicator: yeswork area lighting: yesaudible signal: yesautomatic shut-off: yesthe non-contact ac voltage indicator detects the presence of voltage in an insulated wire and at a short distance from it. Voltage detection is signaled by a red led an audible signal and an lcd display.the tester uses the phenomenon of electromagnetic induction. The closer it is to the voltage source the more frequent the readings. After being turned on the tester operates in low sensitivity mode in which the reading frequency increases when the wire is touched. In high sensitivity mode the reading frequency increases approximately 1 cm from the wire. The tester also enables non-contact detection of a break in a live electrical wire. At the point of interruption the tester will stop indicating the presence of voltage.sound light (led) and lcd indicationac voltage detection by induction: 12 - 1000 vlow sensitivity mode* - detects ac voltage up to 1 cm from an insulated wire intense indication after touching the wirehigh sensitivity mode* - detects ac voltage up to 5 cm from an insulated wire intense indication up to 1 cm from the wirewire continuity test by inductiontwo-stage tester sensitivity adjustmentworkplace illumination with a built-in white ledprobe length: 165 mmautomatic tester shut-off after 3 minuteslow battery indicationpower supply: 2 x aaa**