Features:1) Unlocking: either fingerprint, pin/code or mechanical key 2) Tubular latch, easy to install and simple to operate 3) Fingerprint can be erased on the lock directly 4) Total 138 fingerprint templates 5) Integrated cast steel with stainless steel finish 6) All critical parts inside housing 7) With normal open status for meetings 8) Concealed mechanical override for emergencies9) No external wiring required 10) Easy battery replacement 11) Operates on 4 "AA" standard alkaline batteries 12) Back cover easily removed for changing batteries 13) Outside lever free to rotate in locked mode 14) Functions of keypad: a) Open lock with pin/code b) Unlock with pin/code c) Enable to enroll fingerprint d) Modify pin/code e) Delete enrolled fingerprints producing area:China payment:T/T supplying capacity:500pcs/month