STUD detecting depth: wood 30*30mm: ≤18mm
Metal detecting depth: iron pipt Φ25mm: ≤30mm
AC live wire detecting depth: AC 90 ~ 250V ≤50mm

Sampling:
Put detector on measured surface, press the power button on tester side for 2 seconds. Press the SELECT button to choose STUD/METAL/AC live test. Press power button again, a "Di" sound means sampling OK.

Operation:
After sampling, don't release the power button. Move along measured surface, when detect STUD, analog bar begin to display; When all bar display and 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, analog bar begin to display; When all bar display and 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 show analog bar or sound when there is no STUD.
Test for some times to get a accurate result.

Power supply: one 9V 6F22 battery
Product size: 155x72x28mm
Product weight: about 127g (without battery)
Standard accessories: meter (without battery), battery, manual

Packing: single blister
Packing quantity: 60PCS/CTN
Carton size:  CM
G.W. / N.W.: KG