Dear , My name is Eliezer and I'm from Brazil. I'm interested in the; DIGITAL LUXIMETER Display: 3 digit LCD with maximum reading of 1999. Battery Low Indication: The "" symbol is displayed on the left side of the display. Auto Power Off (APO): Turns off in about 10 minutes automatically. Data Logger for 2044 records Log Interval: 0.5s or 1 to 255s (with 1s step). MAX MIN value registration USB communication with computer Measurements in two units: Lux and FC Sensor: Digital visible light Temperature Coefficient: 0.1% C Operating Environment: 0 C to 30 C (up to 80% R.H.) 30 to 40 C (up to 75% R.H.) 40 to 50 C (up to 45% R.H.). Storage Environment: -20 C to 60 C (up to 80% R.H) Power: One standard 9V battery (1604A 6F22) Battery Life: Approx. 200 hours QTY 100 PIECES THERMO HYGROMETER Display: 5 digit Double LCD Sampling Rate: 1 time s Humidity Response Time: 60s Indication of Polarity: Automatic, negative (-) indicated Data Hold Wet Bulb Temperature Dew Point Memory: 256 Data Maximum and Minimum Mode (MAX MIN) Relative Mode Temperature coefficient: 0.1 x (specified precision) C ( 28 C) Operating Environment: 0C ~ 50C, RH