-FT003 Product function introduction: 1. Backlight on/off function; Time function 12H/24H system (default display when powered on: 0:00 24 hours) Transmitter low battery reminder; Alarm function (default display when powered on: 0:00) Buzzer on/off (the buzzer function is turned on or off only for the key sound, the alarm mode is not affected by this); Indoor temperature °C/°F (default °C) Data signal indication; Water tank temperature °C/°F (Default °C) Water tank water level display unit: meter/foot (power-on default: meter). Water tank liquid level high/low alarm mode. Alarm sound on/off display, default on Alarm duration: 120 seconds High/low water level display Water level depth analog display on 10-element LCD bar graph Receiver indoor temperature range: 0°C~50°C/-32°F~122°F Transmitter water tank temperature measurement range: -40°C~60°C/-40°F~140°F Water level measurement range: 1~5m Temperature resolution: 0.1°C Accuracy: ±1°C Water level resolution: 0.01m Accuracy: ±0.05m Transmitter protection level: IP65 (effective protection from rain splashes from any direction) Wireless transmission distance: 100 meters in open space Screen size: 4.3 inches Salt test; (-20°C-60°C) high and low temperature test; Power supply method: Receiver: 3*AAA battery power supply (battery not included in delivery)/TYPE-C power cord power supply; Transmitter: 6*AAA 1.2V NiMH rechargeable battery power supply (built-in solar panel can automatically charge the rechargeable battery when there is sunlight, and the battery is included in the delivery) Material: ABS colour: White Package Contents: 1 x receiver 1 x transmitter 1 x charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.