General description Wireless Thermometer is designed to measure the water temperature of pools and whirlpools accurately and quickly. It features a waterproof and floating transmitter, making it suitable for all outdoor and indoor swimming pools, spas, whirlpools, aquariums, and ponds. The thermometer records the maximum and minimum indoor and water temperatures, ensuring you have precise readings at all times. Technical specifications Material: Plastic Temperature measuring range: -40~60℃ / -58 ~ +140℉ Indoor temperature range: -0 ~ +50℃ Resolution rate: -40 ~ 140℉ Calendar: January 1, 2000 to January 31, 2099 Visible distance outdoors: 100 meters Frequency: 433MHz Speed update: Every 90 seconds (10 seconds long) Transmitter Size: Approx. 16cm / 6.29inch Screen Size: Approx. 12 * 7.7cm / 4.72 * 3.03inch Power: 2pcs 1.5V AAA alkaline batteries (not included) for both screen and transmitter Installation Ensure the sealing ring is tightly tightened after installing the battery to avoid