USE WITH YOUR SYSTEM: This product can be used with your system to respond to signals from the keypad / alarm console. Delivers very loud voice prompts at 120 decibels. This piercing plug-in alarm plugs into your keypad/console. STAND-ON ALARM: On-site alarm with loud siren up to 120dB, pairing with door/window sensors, PIR motion detectors to form an effective and autonomous security system for residential apartments. SMALL PORTABLE: The product is small, flexible and easy to carry. So you can easily take it where you need it, fix it, and it will work for you. EASY INSTALLATION: Installation options are flexible and convenient. Usually installed in a wall, a door, balcony or other places, the installation height is equal to or greater than 2.5 meters.You only need to stick use Product Description Features: Easy to install, just stick on, no wiring, easy to use. Compact, lightweight and convenient to carry. Durable and long service life. Works with your system, responding to signals from an alerted keypad/console. at 120 decibels, providing a very loud voice prompt. This plug-in siren can be plugged into your keypad / console. Features: Material: plastic and metal Rated voltage: 12V DC Sound index: 120dB Sound frequency: 3.8KH2 + 10% Transmission speed: 3H2 increase or 10% decrease Size: 5.2 * 5.0cm / 2.0 * 2.0in Package weight: 64g / 2.3oz Package list: 1 * alarm system sound