Icstation Less than 60mm Simple Metal Detector,for Assemble Kit DIY Electronic Soldering Practice,Metal Sensor Buzzer Arduino DC Metal detector metal sensor Metal buzzer Welding practice board Detector kit Electronic suite Working Voltage:DC3-5V,Detecting Distance:Less than 60mm Metal detector is a high performance metal sensor designed for security.It can also apply to game entertainment,car detection,equipment position detection,metal proximity switch,traffic statistics,etc.. Buzzer start to ring and the red light indicator is on when the metal is close to the metal detector. Easy to install by PCB silk sn and component listing,and we also provide PDF instruction at this page.Simple circuit is easy to assemble and train your soldering skills during assembly process.It is really a funny welding practice for solder beginners! color:blue