Check the listing for details. TandD TR71A Bluetooth and WiFi Temperature Data Logger. Condition: New. Listed at 219.00 USD. TandD TR71A Bluetooth and WiFi Temperature Data Logger Measures and Records (2) Temperature Readings Using an Internal and External Sensor Probes -40°C to 110°C Temperature Measurement Range with ±0.3°C Accuracy Automatic Upload of Recorded Readings to TandD WebStorage Cloud Service at Set Interval and Internal Storage for Backup if Wireless Access Not Available Compatible with the Free TandD WebStorage Cloud Service for Viewing your Recorded Readings Anywhere, Anytime Includes Temperature Sensors (#TR-0106), T&D PC Software is Available as a Download, (2) AA Alkaline Batteries and User Manual. TandD TR71A Bluetooth and WiFi Temperature Data Logger Specifications Measurement 2 Temperature Channels Temperature Sensor Type: Thermistor Measurement Range (Internal Sensor): -10°C to 60°C Measurement Range (External Sensor): -40°C to 110°C (Included Sensor)** Accuracy: ±0.3°C (-20°C to 80°C); ±0.5°C (Rest of the Range) Resolution: 0.1°C Thermal Time Constant: Approximately 75 Seconds Response Time: 190 Seconds to 90% ** External Input Available for Temperature Sensor (Fluoropolymer Coated Type) with Range of -60°C to 155°C. Data Storage Capacity 30,000 Readings/Samples Sampling Interval 1, 2, 5, 10, 15, 20, 30 Seconds 1, 2, 5, 10, 15, 20, 30, 60 Minutes (Total of 15 Choices) Recording Mode Endless: Overwrite Oldest Data when Capacity is Full One-time: Stop Recording when Capacity is Full LCD Display Items Current Readings / Recording Settings / Battery Life Warning / Over Measurement Range Warning / Amount of Recorded Data Power Battery:(2) AA Alkaline External: USB, AC Adapter: AD-05A2 (NA Version) or AD-05C2 (European Version) Battery Life Approx. 10 Days (Auto-Upload Interval ≥ 1 Min.) Approx. 1 Year (Auto-Upload Interval ≥ 1 Hour) Approx. 15 Months (Auto-Upload Interval @ 12 Hour or More) NOTE: Battery Life Depends on Recording Environment, Frequency of Uploads, Bluetooth Activation, Sampling Rate and Battery Performance Communication Types WiFi Communication · Standard: IEEE 802.11b/g/n · Security: WEP (64 bit/128 bit), WPA-PSK (TKIP), WPA2-PSK (AES) · WPS 2.0: Push Button Configuration · Protocol: HTTP, DHCP, DNS Bluetooth Communication · Standard: Bluetooth 4.2 (Bluetooth Low Energy) USB Communication (CABLE-USBMB USB Cable Required) Software Compatibility TR-7wb/nw for Windows, T&D Graph, T&D Data Server (for PC) Operating Environment Temperature: -10°C to 60°C Humidity: 90%RH or Less (No Condensation) Weight 55 grams Dimension 58mm x 78mm x 26mm