Before you touch a door knob, car door and any metal things, put the eliminator on these metal things. Please make sure to grip the ball chain and end of the eliminator. Make the rubber on the end of eliminator touched on the metal things.
Compact LED light helps you to search something in your bag in the dark.
Battery is easy exchangeable.
battery: CR2016 x 2pcs.
entire length: approx. 8cm / 3.14in
body size: approx. 5cm / 1.96in