Wired outdoor alarm sirens connect to the alarm panel with cable and power, so installation may involve routing wire and mounting to a wall or electrical box. Wireless outdoor alarm sirens use batteries and pair with a compatible wireless security system, which can simplify placement where wiring is difficult while requiring attention to signal quality, system compatibility, and battery status.

Outdoor alarm sirens with sound only use an audible tone to signal an alarm, while siren-strobe combinations add a visible LED light for added visual notification. Siren-strobe units may support faster recognition from a distance or in noisy environments, and available designs include indoor or outdoor mounting, weather-resistant housings, tamper switches, and wired or wireless installation.

Outdoor alarm sirens may mount directly to a wall, a four-inch electrical box, or a single-gang box, while power options include wired low-voltage DC connections and wireless, battery-powered operation. Look for weather-resistant or vandal-resistant housings, tamper protection, and a temperature range suited to the installation environment, with some models also offering an IP55-rated enclosure.

Outdoor alarm sirens offer single, dual, warble, yelp, or steady tones, while sound outputs in the assortment range from 101 dB to 120 dB, helping installers match the audible alert to the site and system design. Siren/strobe options add a visual alert in blue, red, amber, or clear, and some models allow the strobe to operate separately from the siren for more flexible signaling.