Taylor WeatherGuide Wireless Indoor/Outdoor Thermometer with Programmable Temperature Alert, Model 1542 Basic 3 channel radio frequency. Auto scroll function Calendar and 12/24 hour clock with alert High/low temperature memory. Programmable temperature alert Monitors temperature in up to 4 locations (additional remotes required) Remote and base station low battery indicator. Requires 2 AAA batteries for receiver and 2 AAA batteries for remote (batteries not included).