The Omega 8500 metal detector uses 11" DD coil adjustable knobs and buttons to control the interface, numerical depth reading, intuitive menu system and operating depth indicator! It has greater detection depth and accuracy than previous detection machines! Omega 8500 has 64 levels of adjustable identification, allowing you to quickly change the factory's target ID settings. The 11" DD coil feature of Omega 8500 is perfect for achieving many different types of soil and ground balance.