TP-Link Tapo Smart Water Leak Sensor

Specific features: Need to use the Hub | Warnings: Keep out of the reach of children. | Alarm decibels: 90 dB | Battery type: AAA | Height: 30 mm | Power source: Battery | Quantity per pack: 1 pc(s) | Depth: 84.5 mm | Operating frequency: 868 MHz | Operating relative humidity (H-H): 0 - 99% | International Protection (IP) code: IP67 | Number of batteries included: 2 pc(s) | Operating temperature (T-T): 0 - 40 °C | Batteries included: Yes | Width: 46.5 mm | Warnings: Products may contain batteries which are harmful to the environment and should be disposed of appropriately.