Size: 3-1/16" Square X 1-1/4" Height; Optional 4 Ft Water Sensing Cable Included; 3 AA Batteries Included; Conveniently Place Near Sinks, Washing Machines, Water Heaters, Sump Pumps; Notification Messages Can Alert You Or Your Family/Friends Wherever You Are, While The Audible (100 dB Alarm) Alerts Sound When You Are At Home; Use To Detect Temperatures That Can Freeze Pipes And Humidity That Could Damage Valuables; Runs On WiFi - No Extra Hub Or Hardware Purchase Required; Reusable Even After Detecting An Incident; Five Year Warranty