Features:

• Remote temperature sensor for use with Oregon Scientific cable-free monitors
• Perfect for garden, greenhouse, wine cellar, baby's room
• Displays temperature; also radios temperature to monitor (not included)
• Wireless; operates on two AA batteries (not included)
• Works up to 90 feet away from monitor

Editor Reviews:

Product Description:
Can be used with AA Lithium Batteries for extreme coldUses radio-frequency technology eliminating wired sensorsAdd up to a total of 3 sensors with many of Oregon Scientific wireless productsSensors can be placed up to 90 feet from main dis

Amazon.com Review:
Perfect for a garden, greenhouse, wine cellar, or baby's room, this remote, wireless sensor--designed as an add-on for use with any Oregon Scientific cable-free monitor--displays the indoor or outdoor temperature where it's located and also radios the temperature to the monitor, which is not included. The sensor can be placed up to 90 feet away from the monitor, and the channel it uses can be selected from among three options, permitting this sensor to be used with two others by the same monitor. It displays temperature in either Celsius or Fahrenheit, with a range of minus-4 to 140 degrees F. It operates on two AA batteries (which are not included), has a low-battery indicator, measures 4-1/8 by 2-3/4 inches, and can be set on a flat surface with a stand or mounted on a wall (stand and wall mount are included). --Fred Brack

Rating : - New Sensors are just a way to make money
I'm sorry but that's just completely unacceptable. I can understand old units not talking to new sensors but there is NO excuse for new units not talking to old sensors. That's just orgeon scientific trying to make us buy new sensors. That'll do it for me - I have two units that I've been very happy with and was going to add one of those fancy weather stations - until I read that NONE of my sensors will work with it. No way. Just lost a customer.