Oregon Scientific Wireless Multi-Channel Thermometer Cable-free, radio-frequency thermometer; tracks temperatures at up to 3 remote sensors Base has LCD screen; can set temperature range limits, program alarms, recall recent highs and lows, and track temperature trends Sensor can be stationed up to 100 feet away; sends signals every 30 seconds Kit includes main unit and 1 remote sensor; optional Centigrade scales Main unit is 4.6 by 4.21 by 0.98 inches; remote sensor is 4.16 by 2.83 by 0.88 inches