ESD Safety Tools: The purpose of the 1 megohm resistor is for safety: Anti static wristband can continuously discharge the static electricity from the human body through the built-in 1 M resistor to the ground, protecting your electronic components from accidental electrostatic discharge (ESD) damage during repairs. Made of 7 pure copper foil wires, which can eliminate static electricity within 0.1 s, achieving a balance of charge between the hand and electronic devices.