1. Backlight on/off function: The water level meter features a practical backlight function for easy reading under any lighting conditions. 2. Time function 12H/24H: You can switch between 12hour and 24hour time formats. The default display upon startup is 0:00 in 24hour format. 3. Transmitter low battery reminder: The water level meter includes a transmitter lowbattery alert to prevent unexpected power loss. 4. Alarm function: Set reminders for specific times or events with the alarm function. The default display upon startup is 0:00. 5. Sound on/off: The buzzer sound for button presses can be turned on or off, while the alarm function remains unaffected. 6. Indoor temperature °C/°F: The water level meter displays indoor temperature in Celsius or Fahrenheit, with Celsius as the default setting. 7. Product specifications: 8. Power supply: The receiver operates on 3 AAA batteries or a TypeC power cable. The transmitter is powered by 6 AAA batteries or a builtin solar panel that automatically charges the rechargeable battery in sunlight. 9. Temperature and water level measurement: