An auto safety engineer from Detroit, Omer Kiyani, wanted to keep his kids safe from the firearm he bought to protect them but could not find it. So Kiyani invented IDENTILOCK - the world's fastest, most reliable trigger lock activated by fingerprint technology that works in 300 milliseconds - the same as the blink of an eye! Use a microfiber cloth to gently wipe any dirt or residue off your IDENTILOCK. Be sure to clean your fingerprint sensor gently and with ease. Rechargeable lithium-ion battery Over six-month standby battery life Type-C USB Charging Port 360Adeg Fingerprint Recognition LED Indicators Omnidirectional dimple keys Key Lock Cover Dimensions: 4"x5"x1.5" Weight: 11.3 oz The Sig Sauer is designed for following firearm models only: Sig Sauer P226 Variants Sig Sauer P229 Variants Note: IDENTILOCK SIG-A1 does not fit P226-Legion/SAO.