This basic package consists of the main temperature and calendar clock unit and a wireless remote temperature sensor, model THN138. The main unit can support up to three Cable FreeTM remote sensors. Additional remote sensors are available. The main unit has a large easy-read LCD screen that displays the indoor temperature, clock with calendar and temperature data transmitted by the remote sensor to the main unit. In addition, the RMR-166 will store in memory the maximum and minimum indoor temperatures and temperatures transmitted from the remote sensor. The RMR-166 clock is a radio-controlled clock. The clock automatically synchronizes current time and date with radio signals received from the US Atomic Clock, one of the world's most accurate timepieces. To learn more about the US Atomic Clock visit the US Department of Commerce's National Institute of Standards and Technology website at www. Other features include three-language display choice, four-step crescendo daily alarm and easy-change display modes. 1 D E H R L K O Model No. RMR166 ZONE AM M D J G I EXACTSET RADIO CONTROLLED CHANNEL MEMORY SET / MODE DAILY AL C ON/OFF Remote Thermometer RMR166 Tested To Comply With FCC Standards FOR HOME OR OFFICE USE F M -D N P Q GB GB A. THREE-LINE LCD DISPLAY Easy- read display of remote sensor and indoor temperatures, and calendar clock functions B. [ ] REMOTE SENSOR LOW BATTERY ICON Indicates the remote-sensor battery power is low and batteries need replacing C...