I'm selling this because I don't use it. This anti-static product, popular in Europe, comes from Switzerland. Made of highly conductive brass, it achieves an astonishing 98% static electricity removal rate. Static electricity flows out through the Anti Shoc, preventing the skin pain you feel when touching metal directly. The lamp inside the keychain lights up when static electricity accumulated in the body is discharged. When the lamp lights up, it signals that static electricity removal is complete. The keychain does not use batteries, so it can be used semi-permanently. Size: Approximately 11mm in diameter x 57mm in length (excluding the key ring) Weight: Approximately 15g Search terms: keychain, key case, safety, petroleum, gasoline, dangerous goods, static electricity, current, cold wave, static charge, winter, dryness, static electricity removal