The Shepherd 210 which also known as DL210, is one of our most versatile biometric fingerprint door locks with 2 user levels and 5 thresholds, 6 AA battery power supply that lasts 2 or 3 years with normal use, and the ability to add or delete up to 50 users at the lock itself. The Shepherd 210 was chosen as one of the "Best of Innovations for 2004" at the Consumer Electronic Show in Las Vegas, U. S. A. The Shepherd 210 has been featured on ABC's Good Morning America, NBC's Nightline News, CNN Headline News, and many other major news publications across the United States as being named one of the industry's best leader. The Shepherd 210 has twice the protection with a latch and deadbolt, but not twice the price!