BLACK X is an advanced smart cylinder that effortlessly upgrades your existing euro cylinder door without the need for drilling or wiring. It fits all standard euro cylinders and works with lever handles, pull bars, and escutcheons on PVCu, composite, aluminium, steel, and timber doors, including inward and outward opening, patio, and sliding styles. Installation is fast and requires no calibration. Powered by a single CR2 battery lasting up to three years, BLACK X is compatible with accessories like wireless keypads, biometric scanners, and a Wi-Fi bridge. Independently certified for security and cybersecurity, it provides reliable protection against physical and digital threats. The free BLACK X App for iOS and Android lets you use your smartphone as a key, share access securely, generate AI-powered key codes for optional keypads, send access codes to anyone—even without the app—and track door usage remotely. Powered by one battery for up to three years, BLACK X eliminates the need for charging cables or costly battery replacements.