Check the listing for details. RTR502BL Wireless Temp Logger w/ External Sensor & Large Battery Pack *OPEN BOX*. Condition: New – Open box. Listed at 134.25 USD. Measure and Record Temperature with External Sensor ProbeStores up to 16,000 Data Samples Between Wireless Transmissions to Base Collector or RepeaterIP64 Rating for Dust-Tight and Splashed Water Protection150 Meters Line of Sight Transmission Range Between Devices (Logger to Base Collector or Repeater)Automatic Transmission of Data (Current or Logged) at Set Interval to Base Collector or RepeaterCompatible with the Free TandD WebStorage Cloud Service for Viewing your Recorded Readings Anywhere, AnytimeIncludes Temperature Sensor (#TR-5106) and User ManualA Complete System Requires a Base Collector (RTR500DC, RTR500GSM, RTR500NW or RTR500AW) and a RTR500 Series Wireless Data LoggerThe RTR502B is part of the RTR500B series of series of wireless monitoring systems which allows you to mix and match a wide array of wireless data loggers with various base stations and data collectors to meet your needs. The RTR502B is a single channel temperature data logger that uses an external sensor to measure and record temperature from -60°C to +155°C. Data is stored on internal memory and then transmitted wirelessly to a compatible data collector or various base stations up to 500 feet way using radio communication. Recorded data can be automatically sent via network or mobile communications to be saved in cloud storage or to a specified location on your network.