Smaller METAL BODY SIZE and smaller HARDEN STEEL SHACKLE DIAMETER to accommodate smaller hole sizes of various hasps and staples. Embedded with STATE-OF-ART DUAL intelligent proximity & remote authorization technologies that delivers HIGHEST PRODUCTIVITY and LOWER OPERATIONAL COSTS with MULTIPLE LEVELS of high-security ASSIGNMENT, REVOKING, TAG-OUT authorization, NOTIFICATIONS and TRACKING Integrated with both patents and proprietary authentication protocols, capable of generating up to 8 levels of Administrator's authorization and over several hundred thousand of user-defined encrypted IDs. Multiple levels of Administrator's authorization to ONE SHARED smartlock with FREE app and Commercial PAID app software bundled with Web-based Intelligent Access Management Software., Weight: 0.4188782978 pounds, Manufacturer: JSB Tech