Analog Wall Clocks Synchronized or stand-alone.Find the perfect face and format for your facility. Home / Store / Wall Clocks / Analog Wall Clocks RF Wireless Every clock receives a dependable time signal From 902-928MHz Radio Frequency Transmitter. Want more details? Read up on RF Wireless. PoE IP Network Every clock receives power and synchronized time data from PoE Switch. Want more details? Read up on PoE IP Network. Wired Master Every clock receives synchronized time signal from Master Clock device. Want more details? Get the facts on Master Clocks. Stand-Alone These simple stand-alone wall clocks plug into a standard electrical outlet and keep time independently of one another. Still have a few lingering questions? Contact Us. Improve punctuality and productivity Standardize work schedules, production shifts or class changes. SEE BELL SYSTEMS