The Codelocks 4010K keyless electronic lock with knob handle represents a major step forward in entry control. These products offer an exceptional battery life of 200,000 operations from the 4x1.5v AA cells@2900mAh. Over 200,000 operation from 4xAA cells. PVD, weather resistant, low maintenance finish. Connections for remote release by reception desk button. Connections for release by alarm system. Code free entry mechanically by key or electronically from keypad. Allows up to 80 User Codes 4, 5 or 6 digits long. Tamper alarm and low battery warning.