Wireless Outdoor siren with 120db sound and flash . it doesn't work alone. it has to work with a home alarm system. In event of intrusion, the alarm system will send a RF signal to the siren, and then siren will sound a piecing voice to deter the intruder.
in the event of an intrusion, the alarm system will sand an RF to it, and the alarm will emit a high-decibel sound to block the intruder.
