TimeTrax Sync™ RF Wireless Analog Clocks Battery operated or AC power. Home / Store / Wall Clocks / Synchronized RF Wireless / Analog RF Wireless Analog Battery Operated Series Receives power from 3.6 Volt Lithium Battery. Flexible wireless installation. RF Wireless Analog105 – 240V AC 50/60 Hz Standard hard-wired installation. No maintenance required. Still have a few lingering questions? Contact Us. Improve punctuality and productivity Standardize work schedules, production shifts or class changes. SEE BELL SYSTEMS