★★This site has a shared installation video: https://www.facebook.com/alice.zhang.12764/posts/106082589991094.★★ EASY TO INSTALL: Standard single tongue easy to install, can be directly replace the spherical lock. Easy Right or Left Handle Switching, Default for Right Hand
THREE WAYS TO UNLOCK: Mifare-1 card, user code/password, mechanical key. Support up to 200 users available
QUALITY GUARANTEE: Stainless Steel as Raw Material. Stainless steel (304 grade) is purposely designed to absorb more energy without breaking. The stronger resistance to corrosion keeps a longer life time for the finish
CE CERTIFICATE AND SECURITY GUARANTEE: Laser Cut keys, Hidden keyhole, ANSI Grade 1 Highest Residential Security.
BATTERY OPERATED AND PROGRAMMING CARD: Need 4 X1.5v AA batteries (Not included); Comes with two cards, need more cards, Mifare S50 can be matched. The video URL for the battery replacement and programming password card: ★★https://www.facebook.com/alice.zhang.12764/posts/112623532670333★★