La Crosse Atomic Digital Wall Clock - Indoor/Outdoor Temps Displayed. This self-setting digital clock with indoor and exterior temperature additionally features an alarm system with a snooze choice and low battery indicator for both the clock and the cordless sensor. Time readies to defined time area and will instantly reset for Daylight Savings Time. Exterior temperature obtains from cordless tranmitting sensor within a series of 260 ft from clock. Optional for wall hanging or self-standing. Functions: Wireless exterior temperature (F or C) Monitors indoor temperature (F or C) Atomic time and date with hands-on setting Automatically updates for Daylight Saving Time (on/off choice) 12/24 hour time show Perpetual schedule Time area establishing Time alarm system with snooze 4 languages to pick from: English, French, German, Spanish Wall hanging or totally free standingSpecifications: Wireless exterior temperature variety: -39.8 F to 139.8 F Indoor temperature variety: 14.2 F to 99.9 F Transmission variety: Up to 200 Feet Transmission frequency: 915 MHz Power Requirements: Clock: 2 "AA" Alkaline batteries Wireless sensor: 2 "AA" Alkaline batteries Product Dimensions: Receiver: 8.9" L x 1.2" W x 7.1" H Sensor: 1.28" L x 3.41" H x 0.56" W.