Innovative technology with a capacitive sensor on the chain lock allows you to open it without a key or dial – simply using your fingerprint. The YARDO chain lock consists primarily of a 7-millimeter-thick round chain, offering robust protection against theft. The chain ends, available in lengths of 85 cm or 110 cm, are connected to a coated zamac lock body. The lock body's unique feature is its precise fingerprint sensor, which recognizes up to 20 scanned fingerprints. Simply place your clean finger on the sensor, and the lock will open instantly. The ability to read multiple fingerprints provides great flexibility, for example, if you want to share your lock or bicycle with others. The locking process is very simple, as the lock automatically engages as soon as the ends are inserted into the lock body. To prevent scratches on the bike frame, the lock body is covered with a silicone sleeve. IP66 and IP68 certifications attest that the lock body is dustproof and weatherproof. A double ball bearing locking mechanism provides enhanced protection against break-ins. With the YARDO chain lock, comfort, functionality, and design go hand in hand, putting you at the forefront of technology. Fingerprint technology paves the way, offering maximum convenience and a high level of security. A CR2 battery is included.