SABRE Home Wireless Alarm Kit &ndash; Loud 120 dB Siren &ndash; Easy Install &ndash; 3 Pack Window Alarm & Main Door Alarm w/Entry & Exit Delay Settings &ndash;NEW Home Mode Setting for Max Safety While Asleep at Home ATTENTION-GRABBING: Extremely loud 120 dB alarms help wake/alert homeowner or renter, help deter intruders and possibly notify neighbors, audible up to 750 feet (230 m) away MAIN KEYPAD DOOR ALARM PREVENTS ACCIDENTAL ACTIVATION: Alarm is secured by your 4-digit PIN with entry/exit delay (Away) and no-delay (Home). No key fob required. (Note: the 3 smaller alarms work independently and are not controllable w/ the main keypad) RECENTLY ENHANCED HOME MODE: The main door alarm now features Home Mode which immediately sounds when triggered to alert those inside the home of a potential intruder. Rest easier knowing the intruder is not allowed an entry delay to disarm the alarm EASY INSTALLATION: 3 adjustable settings (off/alarm/chime); chime mode alerts you when guests enter/leave your home; no wiring needed. Sensor mounts on either side of alarm  works on both right-side and left-side opening doors! EXTRA SECURITY: Provides battery status update for low battery test button and indicator; keypad unit requires 3xAAA batteries (not included), door/window alarm requires 4xLR44 batteries (included)