Ideal Security Inc. SK662 SK6 Flood Alert Kit Wireless Water Detector and Hub-Built-in Alarms and Notifications by Phone Water Sensor detects leaks and floods and sends a signal to the alarm centre Alarm Center / Dialer stores up to 5 separate phone numbers and will dial repeatedly up to 5 times. Record your own custom voice message to be played. Telephone land line required. No cellular, GSM, VoIP or Wi-Fi options. Maximum communication range from sensor to alarm centre: 60 meter (190 feet) Battery backup for limited continued protection during a power failure Detector & dialer have internal alarms that can be silenced Set also includes all telephone connections, batteries, AC adapter and instructions