The MT300 Wall scanner has a newly designed positioning hole which can accurately and quickly mark-up edges and centre of metal, studs, joists, pipes, live AC wire behind walls, floors and ceilings. The easy-to-read LCD display and ergonomic anti-slip handle provide users with comfort and convenience while scanning, with a sound alarm. The wall detector can be automatically calibrated anywhere on the wall to successfully find the centre of studs in one step. The 6-in-1 meter with fast detection saves users time and effort, making the task completion easier. Exact scan mode locates the centre and edges of wood and metal studs up to 20mm deep; Depth scan mode locates the centre and edges of wood and metal studs up to 38mm deep; Non-Ferrous Metal scan detects metal (Copper) up to 100mm deep; Ferrous Metal scan detects metal (Iron) up to 120mm deep; AC scan detects live unshielded AC wires up to 50mm deep; Copper wire scan detects copper wire up to 40mm deep. When objects are found, the LED light on the centre hole will indicate the direction and the detection signal strength tells whether you are very close to the target. No matter professionals, homeowner and DIY enthusiasts, it must be an ultimate choice.