Always On Device as Required by Barrier Codes. Alarm Goes Off Immediately When Triggered also as Required by Barrier Codes .Can be Manually Reset or will Automatically Reset in 3 Minutes to Continue Siren. Second Delay Allows for Adult Pass-Through . 120 dB Alarm Siren - Minimum 95 dB at 10 Feet . Convenient Single Button Pass/Reset Operation. All Hardware Included for Gate Door or Window Mount . Auto Low Battery Chirp .Water-Resistant Operates on One - 9 Volt Battery (not incl.) . Attractive 4-Color Retail Packaging (English/French).