Avoid that "zap" of static electricity that may build up on metal door knobs, car doors, or other metallic objects.

Touch the unit's metal probe to objects that may have static charge and if detected, the unit will drain the static and light the LED. No batteries required.

Caution: This unit ONLY detects and warns! Do not use this device for any high voltage detecting or monitoring. Do not drop the keychain on the ground as it may damage the electronic components.