Specifications:<br> Machine size :11.8cm X7.4cm X2.0cm/4.64 X2.91 X0.78inch<br> Remote sensor size :12.0cm X5.5cm X7.9cm/4.72 X2.16 X2.91inch<br> Water temperature range: -40 to 60 degrees<br> Indoor temperature range: 0 to 50 degrees<br> The 433MHZ wireless receives water temperature of 3 channels Record the highest and lowest indoor temperature and water temperature<br> Line-of-sight wireless transmission line (outdoor) : 100 feet Frequency: 433 MHZ<br> Update rate: on the remote control, 90 seconds 10 seconds display console.<br> Measurements:<br> Indoor temperature: - 40 to 140 ° F + 2 ℉ 0.1 ℉<br> Water temperature - 58 to 140 ° F + 2 ℉ 0.1 ℉<br> Power consumption:<br> Display console: 2 x AAA 1.5v alkaline battery(no included)<br> Remote sensor: 2 x AA 1.5v alkaline battery(no included)<br> <br> Description:<br> This product USES the high quality sensor, the sensor directly contacts with the water, the measurement temperature is more accurate.<br> Wireless transmission, more than 120 meters away.<br> Super bright LED backlight.<br> It is widely used to measure water temperature in bathtub, swimming pool, fish pond, etc.<br> <br> Special note:<br> This product requires waterproof. And when it's set up. The waterproof ring is required to be installed. Screw down the lid. <br> Package included:<br> 1 X wireless pool thermometer transmitter(not include battery) <br> 1 X wireless pool thermometer receiver(not include battery) <br> 1 X User manual