Time display: 12/24H optional The real-time temperature of the water in which the sensor is located and the real-time indoor temperature in which the host is located can be displayed on the same screen. Support the highest temperature and lowest temperature record of the day Indoor and outdoor temperature display: / optional Indoor host temperature detection range: -9.9~+50 (14.2~122) Pool sensor temperature detection range: -40~+70 (-40~158) Temperature error 1 or less, transmission distance 60m Power supply . Indoor main unit: 2x1.5V "AAA" battery Outdoor sensor: 2x1.5V "AAA" battery Specifications: The Main Buttons On The Receiver Panel Are Easy To Use. Suitable For Measuring The Temperature Of Swimming Pools, Ponds And Spas. The Host Is Placed Indoors To View Data Such As Time, Temperature And Humidity, And The Transmitter Is Placed In An Outdoor Pool To Obtain Data And Transmit It To The Host. The Outdoor Sensor Sending Distance Is 60 Meters. Upgraded And Optimized Waterproof Sealing To Ensure That The Product Will Not Leak And Cause Defective Products. Package Included: 1*host, 1*pool Temperature Outdoor Unit, 1*outdoor Swimming Pool Lanyard, 1*five Language Manual