The Touch 57's smart lock Sensor detects up to 20 embedded prints with 360 degree recognition, Lock lasts up to 10,000 unlocks on one battery cycle, battery can be replaced with a CR2 Lithium Battery when needed. " The Touch 57 fingerprint lock has spring-loaded double locked shackle. Meaning the lock will automatically pop open when the finger is placed on the opening sensor! No key needed. Touch 57 smart lock has Specially hardened steel shackle. Shackle and body are coated for corrosion resistance, lock rated at IP66 & IP68 for out outdoor usage. Touch 57 pad lock has a Weatherproof fingerprint lock that can be used indoors and outdoors. Thanks to good protection against dust and water the touch 57 fingerprint padlock is suitable for businesses, industrial use, offices, and outdoor uses. When it comes to protecting lives and valuables, ABUS provides security solutions that help you feel safe and secure; We've been innovating security technology since 1924