Swann Passcode Protected Magnetic Door Alarm SW351-KCG Powerful 110dB+ siren sounds when movement is detected by the magnetic sensor Passcode protection allows authorized entry 2 Settings - chime sound (alert mode) & 110db+ siren (arm mode) selection Entry & exit delays make it easy for you to turn the alarm on & off Requires 3 x "AAA" batteries (*not included); low battery indication assists with battery change over Powerful 120+ Db Siren Sounds When Any Activity Is Detected By Magnetic Entry Sensor 120 Wide-Angle Detection 2 SettingsChime Sound In Alert Mode & Siren In Arm Mode Easy To Use With Entry & Exit Delays Passcode Protected