Can Work Inside or Out & Can Do Over 2,500 Scans Before the Unit Needs Recharging. the Thermometer Can Save Upto 32 Sets of Data So Thermometer Changing Can be Checked Each Day. the Thermometer Can be Shown in Celsius & Fahrenheit. the Unit Will Shut Down Automatically After 15 Seconds of No Use. the LCD Display has a Backlight So That It Can be Used at Night. Minimum Quantity: 10.