General description Wireless Thermometer is designed to measure pool and spa water temperature accurately and quickly. It features a waterproof and floating transmitter, making it suitable for all outdoor and indoor swimming pools, spas, hot tubs, aquariums, and ponds. The device also includes a snooze function and can record indoor maximum and minimum temperatures. Technical specifications Material: Plastic Temperature measuring range: -40 ~ 60 ℃ / -58 ~ + 140 ℉ Indoor temperature range: -0 ~ + 50 ℃ Resolution rate: -40 ~ 140 ℉ Calendar: January 1, 2000 ~ January 31, 2099 Visible distance in open air: 100 meters Frequency: 433MHz Update rate: Every 90 seconds (lasts for 10 seconds) Screen power supply: 2 pcs AAA 1.5V alkaline battery (not included) Transmitter power supply: 2 pcs AAA 1.5V alkaline battery (not included) Transmitter size: approx. 16cm / 6.29 inch Screen size: approx. 12 x 7.7cm / 4.72 x 3.03 inch Installation After installing the battery, ensure that the sealing ring