Product Name : Static DischargerMaterial : PlasticSize : 6.3 x 2 x 0.9cm / 2.5" x 0.8" x 0.35"(L*W*T)Keyring Diameter : 2.5cm/ 1"Main Color : Silver TonePackage Content : 1 x LCD Anti Static, 1 x KeyringNet Weight : 9gEscape from shock due to discharge of static electricity.Release static electricity security within the human body in 0.2-3 second.LCD shown by the electrostatic on you.Key holder design.This anti-static is to eliminate static electricity.Can safely and effectively eliminate the hazards static.No battery need. Use permanently. Easy to use, hold the key chain, then contact electric conductor (such as car, computer, metal stuff) with this product.Note:Light and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/-1-3 cm.