Pyramid 3" character, 6-Digit LCD RF Wireless Battery Operated Digital Clock (S9D3L6LBXB) Flexible installation eliminates costly electrical wiring; Uses maintenance-free long lasting 3.6V Lithium C-size batteries (2 batteries, sold separately) Receives dependable time signal once per day from Pyramid TimeTrax Sync Wireless RF Transmitter (9T1WI sold separately) Energy efficient LCD Display; 6 digit (HH:MM:SS), 3" character format accommodates accurate and detailed time keeping and recording needs Low profile, ABS black frame with non-glare shatterproof lens for easy viewing and durability Automatically adjusts for Daylight Saving Time and resets for power outages Made in USA