Mini and compact design, high-quality wireless anti-vibration security alarm, easy to install and use. Alarm with ON/OFF switch and remote control with alarm/deactivation doorbell and emergency buttons for easy operation. 105dB very loud sound that can last approximately 40 seconds, low power consumption and long working time; Wireless anti-vibration alarm with infrared remote control. Remote control with keychain for easy carrying. More remotes: If you need additional remotes for a family member or just for spares. Easy operation 1) Arm button: Press this button; when triggered, the alarm sounds at 110dB. 2) Disarm button: Press this button; the arming or loud sound stops. 3) SOS button: Press this button while the alarm is armed; the alarm sounds at 105dB, even if the device is not armed. This function will be very useful when someone is in danger or needs urgent help. 4) Doorbell button: Press this button; when triggered, it will sound a "dingdong" to alert you that someone is