Features: Spa Pool Thermotere Wireless Remote Floating Thermometer Swimming Pool Spa Hydromassage Pond Spa ThermometerThe product is shipped based on the color or size of the main image of the product page.Features:Temperature measurement used in pool pond fish tank.Maximum temperature minimum temperature memory function.Indoor temperature and humidity display.Outdoor temperaturedisplay.Outdoor high degree of waterproof performance.Descriptions:It has Calendar, Clock, Alarm.There are and to choose.It is 30m waterproof, which sis suitable for using in the spa,bathtub or swimming pool.Specification:Distance between sensor and the host : 100metersFrequency: 433 HzOutdoor temperature range: -40 ~ 60Temperature sensor response time: 48secondsIndoor temperature range: 0 ~ 50Host sensors can detect three channelsTemperature range inswimming pool: -40C~60C (-40F~140F)Wireless transmission range: 100mtransmitteruses 2 x AA batteries (not included )The receiver uses 2 x AAA batteries (not included )Material : ABSProduct Machine size : 12*7.5*2.2cmPackage size : 17*13.5*10.3cmPackage Content:1 x Wireless Pool Spa Hot Tub Thermometer1 x Remote Sensor