Worldâs first smart folding bike lock - Combines the strength of hardened steel with an innovative folding design for ultimate portable bike securityLock/unlock via the BLACK X App (iOS & Android) or xKey remote, with 128-bit AES encryption for advanced protectionFolds down to just 4`x8.28`x1.2` and includes a universal bottle cage/frame mount for easy transport31` extended length to secure frame and wheels to racks, posts, or fixed objects; ideal for urban commutingUp to 2-year battery life with CR2 battery (included) plus 2 mechanical keys for backup access31`/79cmBLE/KeyBlackIncludedSLBX-TI-FLDUPC/EAN/GTIN: 850059247754