How much does this cost to the nearest dollar?

Water Leak Detector Sensor Alarm Home Water Flooding Monitor Smart Sink Overflow Monitoring Adjustable Wet Moisture Alert Pipe Leakage Drip Detection Warning for Basement Floor 4Pack
Drip & Leak Alerts Water leak detector alarm is designed with 4 rear water leakage detection probes and 2 front drip probes. There will have an alert when any of the three sets of probes were under the water. Wireless & Easy to Use No wire or setup required, just put it on any place where the water leak may be happening. Loud Alarm with Mute Our 100dB alarm is loud enough to be heard, you can clearly know where the leak occurred and deal with it in time. IP66 Waterproof & Durable It adopts IP66 super waterproof surface shell allows long-term use in high humidity areas and long battery life.

Price is $42.00

Price: $41.99