Press the "Power" button for at least two seconds, if it doesn't turn when you press it. The LCD screen on the monitor illuminates when it's powered on; a light flashes on the LED of the transmitter when it's on.
Press the "Reset" button on the transmitter and monitor to restore operation if the unit doesn't work properly after changing the batteries or after first turning on the unit. The transmitter and monitor must be reset together to synchronize the units. The "Reset" button is in the battery compartment on both units.
Listen closely to the beeps and sounds. Three beeps indicate the transmitter and monitor are out of range; they should sit no more than 300 feet apart. The beeping slows, and the voice prompt says "your entree is almost ready" when the temperature is 5 degrees F from the target temperature. The beeping quickens and a voice prompt announces "your entree is ready" when the target temperature is reached. A fast, continuous beeping indicates the food is over the targeted temperature.