SODIAL(R) New Wireless Digital Floating Swimming Pool Thermometer Bath Spa Temperature Water temperature; Indoor temperature; 433MHZ wireless receives 3 chanel's water temprature; Max/min record of indoor and water temperature. Waterproof and floating Outdoor transmitter Transmitter dive up to 30m. Calendar from 2000 to 2099 Time alarm with snooze;Indoor temperature: 0??C to +50??C Outdoor temperature range:-40??C to +60??C Temperature accuracy:??1.0??C. Receiver: 2xAAA 1.5V Alkaline batteries Transmitter: 1.5V 2xAA Alkaline batteries Battery life: Minimum 12months for base station Minimum 12months for transmitte 1xPool Thermometer ,1xReceiver 1xManual