Description: Advanced Features: This pool water thermometer has a host unit that can be placed indoors to display time, temperature, humidity and other data.Device Distance: The device is placed in the outdoor pool to collect data and transmit it back to the host. The outdoor sensor device distance can reach 60 meters.Waterproof Design: Our swimming pool thermometer has been upgraded and optimized for waterproof sealing to ensure there are no leaks or other product defects.Comprehensive display: It can simultaneously display the real time temperature of the water body where the transducer is located and the real time indoor temperature where the host is located. Pool Thermometer supports daily maximum and minimum temperatures.Material: Tub Thermometer is made of PP material,can be used repeatedly and has a long service life. Specification: Time display: 12/24H optionalIndoor host temperature detection range: -9.9C to +50C (14.2F to 122F).Pool sensor temperature detection range: -40C to +70C (-40F to 158F).power supply:Indoor host: 2x1.5V "AAA" alkaline batteries (not included in shipment)Outdoor sensor: 2x1.5V AAA alkaline batteries (not included in shipment) Size Chart: Indoor unit 6cmx2.2cmx9cm/2.36inchx0.87inchx3.54inchOutdoor unit 8cmx13.3cm/3.15inchx5.24inch Package Includes: 1 host1 Pool temperature outdoor unit1 outdoor unit swimming pool lanyard1 Instructions in five languages Note: Please allow slightly errors 1-2cm differences due to manual measurement.