Check the listing for details. TandD TR42A Bluetooth Temperature Data Logger with External Sensor. Condition: New. Listed at 139.00 USD. TandD TR42A Bluetooth Temperature Data Logger with External Sensor External Sensor for Temperature Measurements in an Indoor Environment Wireless Transmission of Recorded Readings to Phone or Tablet Using Bluetooth Smart LE Communications -60°C to 155°C Measurement Ranges with a ±0.3°C Accuracy User-Replaceable Lithium Battery with 1.5 Year Typical Life (10 Minute Sampling Rate) Stores up to 16,000 Measured Readings with Date/Time Stamp if Bluetooth Communications Not Available Compatible with the Free TandD WebStorage Cloud Service for Viewing your Recorded Readings Anywhere, Anytime ThermoREC and ThermoStorage Apps Available from Apple Store and Google Play for Setup and Reporting New! TR4 Report App for Viewing, Annotating, Saving and Emailing Reports. Available for iOS. Includes Thermistor Sensor, 1/2 AA Lithium Battery and StrapTandD TR42A Bluetooth Temperature Data Logger with External Sensor Specifications Temperature Sensor Type: External Thermistor Measurement Range: -60°C to 155°C (-76°F to 310°F) Accuracy (±0.3°C): -20C to 80C ( F to F) Accuracy (±0.5°C): -40C to -20C and 80C to 110C ( F to F) Accuracy (±1.0°C): -60C to -40C and 110C to 155C ( F to F) Response Time: 80 Seconds to 90% (Air); 7 Seconds to 90% (Agitated Water) Thermal Time Constant: 30 Seconds (Air); 4 Seconds (Agitated Water) Resolution: 0.1°C Data Storage Capacity 16,000 Temperature Readings (When Bluetooth Communications Not Available) Memory Mode Overwrite when Full or Stop When Full LCD Display Measurements, Recording Status, Battery Life Warning, etc. Sampling Rate 1 Second to 60 Minutes (User-Specified) Power Source 1/2 AA 3.6 Volt Lithium Battery (User-Replaceable) Battery Life Up to 1.5 Years @ 10 Seconds Sampling Interval Communications Type: Bluetooth Wireless Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0) Software ThermoREC (Android 4.4+, iOS 9.0+), ThermoStorage, TR4 Report (iOS 9.0+) Note: Bluetooth 4.0 is Required on your Mobile Device (Phone or Tablet) OS Compatibility Android Phones and Tablets iPhone, iPad, iPod Touch with iOS 7.1 or Later Bluetooth 4.0 or Later Devices Smartphone, Tablet Operating Environment Temperature: -40°C to 80°C (-40°F to 176°F) Humidity: 0 to 90% RH (No Condensation) NOTE: -25°C to 80°C During Wireless Communication Standards Compliance CE, IP64 (Splash Proof) Environment Primarily Designed for Indoor Usage Weight 45 grams (1.58 oz.) Dimensions 6.2 cm x 4.7 cm x 1.9 cm