Pyramid 13" RF Wireless 12-Hour Analog Clock, Battery Operated (S9A3AAGBXB) Receives dependable time signal every 24 hours from Pyramid TimeTrax Sync Wireless RF Transmitter (9T1WI sold separately) Uses maintenance-free long lasting 3.6V Lithium C-size battery (42224 sold separately) Standard 12-Hour clock face 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