Spa Pool Thermotere Wireless Remote Floating Thermometer Swimming Pool Spa Hydromassage Pond Spa Thermometer The 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 temperature display.Outdoor high degree of waterproof performance.s: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 : 100 metersFrequency: 433 HzOutdoor temperature range: -40 ? ~ 60 ?Temperature sensor response time: 48 secondsIndoor temperature range: 0 ? ~ 50 ?Host sensors can detect three channelsTemperature range in swimming pool: -40'C~60'C (-40'F~140'F)Wireless transmission range: 100mtransmitter uses 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