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SK3440 is a security keypad from RCA Security. It is a versatile, 4-function keypad designed for use in burglar alarm systems. It features four operating zones, recessed keys for tamper-proof operation, an audible tone and silent mode for discreet arming and disarming, and a system test mode. The SK3440 security keypad also features a low-battery indicator, AC power and battery backup, and a trouble indicator that can be used to diagnose system trouble. The keypad is UL listed for residential and commercial installations and includes detailed installation instructions.