Amazon.com has an Oregon Scientific Cable-Free Thermometer for $21.67. Free Shipping on orders over $25.
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- Cable-free, radio-frequency thermometer; tracks temperatures at up to 3 remote sensors n
- Base has LCD screen; can set temperature range limits, program alarms, recall recent highs and lows, and track temperature trends n
- Sensor can be stationed up to 120 feet away; sends signals every 30 seconds