<p>4 in 1 designed: clock, indoor and outdoor thermometer, voltmeter, frost alert.</p> <p>Supply car power and built-in memory battery which can continue to work without backlight after power off, supply car power.</p> <p>Indoor/outdoor thermometer: can choose Fahrenheit and Celsius mode, with range of -50? - 70? / - 58? - 158?.</p> <p>Digital clock: 12 / 24 hour mode choose.</p> <p>Small and easy to install in your car, large LCD display and blue/orange backlight makes it easy to see.</p> <p></p> <p>Descriptions</p> <p>Display:</p> <p>Widescreen LCD;</p> <p>Blue and Orange backlight choose;</p> <p></p> <p>Clock function of:</p> <p>Calendar: day and date</p> <p>12 / 24 hour mode;</p> <p>Snooze function alarm clock and 5 minutes, snooze time: 5 minutes;</p> <p></p> <p>Thermometer function:</p> <p>Adjustable degrees Fahrenheit and Celcius(?/?);</p> <p>Outdoor and indoor temperature monitoring;</p> <p>Exact temperature: ±1.0?</p> <p>Duration of temperature measurement: 60 s</p> <p>Voltmeter function</p> <p>DC: 12V</p> <p></p> <p>Key functions:</p> <p>Time: change day and date. Press 2s to enter the time setting state;</p> <p>ALM: show alarm time. Press 2s to enter alarm setting state UP: key up + 1. Under set alarm state, press to turn on/off the alarm sound.</p> <p>SNZ: Set snooze</p> <p>DOWN/?/?: key down -1, passage between ? /?. Press 2s to activate the outdoor freeze-alert.</p> <p></p> <p>What's in the box:</p> <p>1 x 4 in 1 car tester.</p>