The Wireless Temperature Alert with plug in receiver is a versatile unit for remotely monitoring temperatures in greenhouses, for monitoring livestock, monitoring datacenters, and more! Adjustable high and low temperature limit can be set. Easy to install, this system has no cables to run. Capable of a wireless range of up to one mile (clear line of sight).*The receiver is compatible with all Dakota 4000 series sensors Wireless Temp Alert Specifications 12 Different alert sounds DCR4000 receiver is powered by 12VDC Wireless Range: Up to 1 mile * clear line of sight/ no interference Temperature alarm range from -50° to +130°F (10° to +54°C) Accuracy: +/- 1.7°C Transmitter is powered by a 3-volt lithium battery (CR123A) with an average lifespan of up to 1 year Frequency - 433.92 MHz Wireless Temp Alert Includes 1 x Winland MTA-2 Wireless Transmitter 1 x Dakota DCR4000 Wireless Receiver 1 x Wireless Transmitter & CR123A battery