Key features and benefits Backlight on/off function The water level monitor includes a backlight that can be turned on or off, making the display easy to read in any lighting condition. This helps you check levels at night or in bright environments without squinting or moving to a different angle. Time display format 12H/24H You can select between 12hour and 24hour time formats for the display to suit your preference. The default display when powered on is 0:00 in 24hour format. Transmitter low battery reminder The monitor warns you when the transmitter battery is running low, helping prevent unexpected power loss and ensuring continuous monitoring. Alarm function The builtin alarm lets you set reminders for specific times or events, supporting routine checks or maintenance. Practical applications Aquarium or fish tank Use the water level monitor to track water levels and receive reminders for water changes or refills. The backlight aids nighttime reading, and the low battery alert helps ensure the monitoring stays active. Hydroponics or grow rooms Maintain reservoir levels and nutrient solution availability with timely reminders. The 12H/24H time option supports your daily feeding or refill schedule, and the alarm function can schedule routine tasks. Home water storage or rain barrels Monitor tank levels to avoid running dry and to plan refills. The backlight improves visibility in outdoor or shaded areas, and low battery alerts prevent gaps in monitoring. Note This description reflects the four primary features as provided: backlight control, 12H/24H time display with a 0:00 24hour default, transmitter low battery reminder, and an alarm function. No additional specifications such as size, material, or compatibility are available in the provided information.