Black. The Loxal BL block lock pro is an advanced, cloud-connected digital gate lock designed for high-security applications in commercial and industrial settings. It replaces traditional padlocks and key systems, offering enhanced security and intelligent access control. The Block Lock Pro is ideal for securing vehicle entrance gates, construction sites, storage units, and other critical infrastructure, offering a robust solution for safeguarding essential areas while providing convenient access for authorized personnel.. 7 digit codes. Stand alone power with up to 4 years battery life. Data and audit transfer app. Emergency power-up facility for reliability in critical situations