The multi-functional HI 76306 probe measures EC/TDS and temperature in one rugged unit. EC (or TDS) and temperature readings are displayed on the LCD simultaneously. Symbols and messages on the LCD indicate the meter status and guide the user through operations. At start-up, the meter shows the remaining battery percentage and when a low battery condition is detected, a battery symbol appears on the LCD to advise the user that only a few hours of working time is left.