Through-hole Practice Soldering Kit (Handheld Metal Detector)

Want to practice soldering components without the fear of destroying expensive equipment? Try out this neat little kit!This is a simple metar detector kit with buzzer alarm sound.SpecificationsWorking current:about 23mA(under normal alarm)Static working current: 3.7mA (without alarm)Supply voltage: 2x CR2032(included)Working power:3-5VMaximum detection range: 3-5cmPCB size:60*185mm