• Large, 4.25 inch time display.Monitors IN temperature (F/C).Atomic time and date (manual setting).
• Automatically updates for Daylight Saving Time (on/off option).12 / 24 Hour time.
• Insert 3 new “C” batteries(not included) into the clock.Observe the correct polarity.
• Insert 2 new “AAA” batteries into the outdoor sensor. Observe correct polarity. The red LED will flash when transmitting..
• After 5 minutes place sensor outside in a shaded location..

Jumbo 4.25 Inch Time digits includes Wireless transmitting outdoor sensor View larger ( https://images-na.ssl-images-.com/images/I/61SI0+c01wL.jpg ) La Crosse Technology 513-1311OT Jumbo Atomic Digital Wall Clock with Out Temperature, Silver ----------------------------------------------------------------- Easy to Read extra-large digital clock features self-setting atomic time and automatically resets for daylight saving time. A wireless reception from included outdoor sensor (requires 2 AA batteries, not included) transmits from a 330 ft range, sending outdoor temperature with accuracy and speed. The clock displays the date with indoor temperature monitoring (F or C) and can be viewed in 12 or 24 hour time. Can be wall hung or desktop standing. Self-setting Atomic Time ------------------------ Receives WWVB radio signal to update to 4 US time zone settings (ET, CT, MT, and PT) Will automatically update for daylight saving time. Temperatures ------------ Monitors both indoor temperature and wireless outdoor temperature. Viewable in Fahrenheit or Celsius. Wireless readings ----------------- Included wireless transmitting sensor sends outdoor temperature inside to your clock. Weather resistant with a range of 330 feet. Obstructions (such as walls or glass) can diminish range distance. Time alarm ---------- Set an alarm for keeping on time during meetings or classroom testing. Features a 5 minute snooze time. Clock dimensions: 16.14"L x 1.69"W x 10.63"H View larger ( https://images-na.ssl-images-.com/images/I/61j+X0gj3TL.jpg ) Extra large for easy view ------------------------- Wall in a class or conference room. Extra large digits for seeing in the back. Or, add to large living room or den. Can also stand alone onto a hotel's front desk or large lobby countertop. Benefits -------- * Large, 4.25 inch time display * Monitors IN temperature (F/C) * Wireless OUT temperature (F/C) * Atomic time and date (manual setting) * Automatically updates for Daylight Saving Time (on/off option) * 12 / 24 Hour time * : month, date and day * Time zone setting * Time alarm with snooze * Wall hanging or free standing * Transmission range up to 330 ft (no interference) * IN Temperature Range: 32 F to 122 F (0 C to 50 C) * OUT Temp range: -4 F to 140 F (-20 C to 60 C) * Clock : 3 C alkaline batteries (not included) * Sensor: 2 AA alkaline batteries (not included)