Simply place the sewing products (needles, etc.) on the surface of the detection unit, and the unit will detect any needles, etc. and warn you by light and buzzer. This unit can sensitively detect pins up to 8-9cm above the surface of the detection unit. In addition, by including an original Kett safety power circuit, the safety of this unit against outside noise and shock has been significantly upgraded. This D-605 is an indispensable product for shipping and receiving Western and Japanese style dress-making products. Furthermore, a small size needle detector for detecting the presence of needles and an outside buzzer that can emit a warning noise loud enough to be heard even in the noisiest environments are available.