1. Backlight on/off function: The water level meter features a practical backlight on/off function, enabling easy reading of the display under any lighting conditions. 2. Time function 12H/24H: You can select between a 12hour or 24hour time display format. The default setting upon poweron is 0:00 in 24hour format. 3. Transmitter low battery reminder: The water level meter includes a transmitter low battery alert, ensuring you are never caught off guard by a power loss. 4. Alarm function: With the alarm function, you can set reminders for specific times or events. The default indicator when powered on is 0:00. 5. Buzzer on/off: The water level meter allows you to enable or disable the button sound using the buzzer function. This setting does not affect the alarm mode. 6. Indoor temperature °C/°F: The water level meter displays indoor temperature in either Celsius or Fahrenheit, with Celsius as the default unit. 7. Product specifications: 8. Power supply method: The receiver can be powered by 3 AAA batteries or a TypeC power cable. The transmitter operates on 6 AAA batteries or a builtin solar panel that automatically charges the rechargeable battery in sunlight. 9. Temperature and water level measurement: