3A 250V Green Push Button Lock Type ESP Boards It's a 10 x 3mm

It's a 10 x 3mm Neodymium Magnet in cylindrical shape

The detection distance of low sensitivity could be only 1 meter and high sensitivity could be 8m

The BC857 transistor is a PNP general-purpose transistor

These are Metal Film Resistor with a value of 47 ohm 2W and tolerance of ±5%

Long-life compare as bulbs indicators

3A 250V Green Push Button Lock Type ESP Boards It's a 10 x 3mmThe ON OFF Locking type push switch is used in control circuits for controlling the contactor, relay, electromagnetic starter, and other electronic circuits. This switch can also be widely used in car or home latching types. This switch is turned on when push down and turned off when push down again. This is a locking type switch. Specification Voltage Current Rating 3A @250V Colour Green & Black Type Self Lock Type Button Diameter 12mm Dimension 40mm