THE R1640 IS A 2-CHANNEL COMPACT THERMOCOUPLE THERMOMETER THAT CAN BE USED EITHER STAND-ALONE OR WITH THE REED SMART SERIES APP (AVAILABLE FOR DOWNLOAD ON ANDROID AND IOS). WHEN CONNECTED TO THE APP THE R1640 CAN BE SET UP TO DATA LOG MEASUREMENTS OVER A GIVEN PERIOD. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" DISPLAYS 2 TEMPERATURE MEASUREMENTS SIMULTANEOUSLY EASY TO OPERATE DESIGNED FOR ONE-HAND OPERATION INTEGRATED 1.3"" DISPLAY PROVIDES FLEXIBILITY FOR USE WITHOUT A MOBILE DEVICE MAGNETIC BACKING ALLOWS THE INSTRUMENT TO BE MOUNTED TO METALLIC SURFACES DATA HOLD FUNCTION USER SELECTABLE °C OR °F LOW BATTERY INDICATOR AND AUTO SHUT OFF TRIPOD MOUNT FOR LONG-TERM MONITORING BATTERY LIFE APPROX. 50 HOURS (SAMPLING TIME DEPENDENT) MAX # OF CONNECTED DEVICES 6 MAXIMUM OPERATING ALTITUDE 6561' (2000M) OPERATING TEMPERATURE 32 TO 104°F (0 TO 40°C) STORAGE TEMPERATURE -4 TO 140°F (-20 TO 60°C) OPERATING HUMIDITY RANGE 10 TO 90% STORAGE HUMIDITY RANGE 10 TO 90% WHEN USED WITH THE REED SMART SERIES APP UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" REAL-TIME DATA LOGGER USER-SELECTABLE SAMPLING RATE FROM 1 TO 120 SECONDS BLUETOOTH® 5.0 PROVIDES CONNECTIVITY TO INSTRUMENTS UP TO 246' (75M) AWAY CONNECT MEASURE AND DATA LOG UP TO 6 INSTRUMENTS SIMULTANEOUSLY EASY SETUP WITH AUTOMATIC APP INTEGRATION FOR COMPATIBLE REED SMART SERIES INSTRUMENTS EXPORT DATA VIA EXCEL OR PDF AND CREATE CUSTOM REPORTS THAT CAN BE EMAILED FROM A MOBILE DEVICE INCLUDES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" THERMOCOUPLE THERMOMETER 2 X BEADED WIRE PROBES 4 X AAA BATTERIES APPLICATIONS UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" MEDICAL PHARMACEUTICAL ENVIRONMENTAL MONITORING INDUSTRIAL AND COMMERCIAL TEMPERATURE APPLICATIONS RESEARCH AND DEVELOPMENT AND EDUCATIONAL ESTABLISHMENTS FOOD SERVICE