The bosch pmd 10 multi detector detects the most frequent materials found behind walls ceilings and floors including ferrous and non ferrous metals ac live wires and studs not only is the pmd 10 multi detector simple and easy to use it will save you time and money its important to know what lies behind your walls before you start drilling hammering or other diy work with the handy pmd 10 you will find exactly what youre looking for behind your walls whether its live ac wires wood s