Description: Adopts optical sensor, CMOS chip. Unlock: Fingerprint, PIN or key. Up to 99 fingerprints capacity. Automatic wakeup, no more pin code. Individual user deletion. Reversible handle fit any left or right handed door. LCD for easy operation. External Stand-by Power supply. Fit most cylindrical locksets. Heavy duty construction design. Set to passage mode at any time. Fingerprint won"t lose if batteries are dead. Schlage style override key is for emergency. (The mechanical key can"t be used as regular key) Highly recommended for Indoor use. 4 AA batteries, one year battery life. Low voltage warning. One year limited manufacturer"s warranty. Specifications: Authentication speed < 1 second. Authentication methods: 1:N. Response time < 1 second. FAR (False Accept Rate) < 1/100000. FRR (False Reject Rate) < 1/100. Angle for putting finger: Any angle. No external wiring required. Power Supply: 4 standard AA batteries. Static Consumption: < 30uA. Dynamic Consumption: 100mA-220mA. Operating humidity 15%-95%. Operating temperature: 18° F to 185° F. Adjustable latch: 2 3/8" or 2 3/4" backset. Fit a standard 2-1/8" diameter hole, a small extra hole need to be drilled on door. Fit door thickness from 1-5/32" to 2-3/8" Designed for INTERIOR door ONLY Color: Satin Chrome Please Call 1-800-610-8708 or Email to info@scyanelectronics.com if you have question.