Check the listing for details. 4" WIRELESS D-LINK CLEANOUT PLUG ALARM SENSOR. Condition: New. Listed at 349.95 USD. • Help Avoid Costly Water Damage: Plug in Master Unit and Sensor Pod system is easy to set up. Place up to 16 Sensor Pods (DCH-S163) in areas susceptible to water leaks such as water heaters, washers, and under sinks. • Visual and Audible Water Leak Alerts. The water leak sensor will let you know as soon as it comes in contact with water, sending you a rich notification to your mobile device. The Master Unit water sensor will also sound a loud 100dB alarm and flash an LED strobe. • Multi-alert system (visual, audible, and mobile) for real time notifications. Powerful LED strobe light, built in 100dB alarm, mobile phone notifications, and voice alerts with Google speakers. • Always on Protection. Master Unit plugs into wall socket and and connects to your home Wi-Fi, while the remote Sensor Pods (DCH-S163) are powered with two pre-installed AAA batteries (last up to five years) • Uses your Home's WiFi. Master Unit connects to your WiFi, while the Sensor Pod(s) leverage the sub-gigahertz channel for greater range and areas that WiFi cannot penetrate like the basement Connects to your existing Wi-Fi router, no hub required Plug into any standard AC Powered, type A plug socket (100-240 VAC, 50/60 Hz) Integrated Sub-GHz hub for long-range sensors (over 300 ft. indoors or 1,000 ft. in open space) Compatible with up to 16 DCH-S163 water sensors Strobe LED provides visual alert Built-in 100 dB speaker/siren for audio alerting Built-in Bluetooth™ for faster setup Works with the free mydlink™ app Always up to date with over-the-air firmware upgrades Works with the Google Assistant Sensor battery life of up to five years 1-year D-Link warranty - Connects to your existing Wi-Fi router, no hub required Plug into any standard AC Powered, type A plug socket (100-240 VAC, 50/60 Hz) Integrated Sub-GHz hub for long-range sensors (over 300 ft. indoors or 1,000 ft. in open space) Compatible with up to 16 DCH-S163 water sensors Strobe LED provides visual alert Built-in 100 dB speaker/siren for audio alerting Built-in Bluetooth™ for faster setup Works with the free mydlink™ app Always up to date with over-the-air firmware upgrades Works with the Google Assistant Sensor battery life of up to five years