Put detector on measured surface, press the power button. The first red LED and green LED are on, and heard a "Di" sound. When the red LED goes out, it said sampling is OK. If the first red LED and “Di” sound keeps on, it said sampling failed.
When sampling is OK, don't release the power button. Move along measured surface, when detect STUD, red LEDs in turn light; When all red LEDs light and sound "Didi..", mark this first position, then release the power button.
Put detector on measured surface, re-sampling and move from opposite side to the first marked position. When detect STUD, red LEDs in turn light; When all red LEDs light and sound "Didi..", mark this second position, then release the power button.
Repeat test for some times, if the alarm is repeat. STUD may exist between the first and second marked position.
Keep detector far from test object, move the knob till it sounds and shines. Move back a little to stop sound and shine.
Detector will not shine or sound when there is no metal or STUD.
Test for some times to get a accurate result.
Power supply: one 9V 6F22 battery
Product size: 145x62x25mm
Product weight: about 71g (without battery)
Standard accessories: meter (without battery), battery, manual
Packing: single blister
Packing quantity: 60PCS/CTN
Carton size: 52x29x27CM
G.W. / N.W.:8.5/8KG