1. Backlight on/off function 2. Time function 12H/24H system (default display when powered on: 0:00 24 hours) 3. Transmitter low battery reminder 4. Alarm function (default display when powered on: 0:00) 5. Buzzer on/off (the buzzer function is turned on or off only for the key sound, the alarm mode is not affected by this) 6. Indoor temperature C/F (default C) 7. Data signal indication 8. Water tank temperature C/F (Default C) 9. Water tank water level display unit: meter/foot (default at power on: meter) 10. Water tank liquid level high/low alarm mode 11. Alarm sound on/off icon display, default on 12. Alam duration: 120 seconds 13. High/low water level icon display 14. Water level depth analog display on 10-element LCD bar graph 15. Receiver indoor temperature range: 0C~50C/-32F~122F 16. Transmitter water tank temperature measurement range: -40C~60C/-40F~140F 17. Water level measurement range: 1~5m 18. Temperature resolution: 0.1C Accuracy: 1C 19. Water level resolution: 0.01m Accuracy: 0.05m 20. Transmitter protection level: IP65 (effective protection against rain splashing from any direction) 21. Wireless transmission distance: 100 meters in open space 22. Screen size: 4.3 inches 23. Body material: ABS 24. Product certification: FCC-ID; ROHS; CE-EMC; CE-LVD; IP65; UL (60335-1) test; Salt spray test; (-20C-60C) high and low temperature test; 25. Power supply mode (batteries are not included in delivery): Receiver: 3*AAA battery power supply/TYPE-C power cord power supply; Transmitter: 6*AAA battery power supply Colour:As Shown Material:plastic Package Contents: 1 x Receiver 1 x Transmitter 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.