McIntosh Labs Novelty Clock (MCLK12) Blue meter lighting may be switched on or off from the front panel, or by other McIntosh components, depending on the viewing conditions. Faceplate is the same width as other McIntosh equipment, allowing for rack placement; also wall or shelf mountable. The left meter measures hours while the right measures minutes. The hour and minute hands cover a twelve and sixty minute arc respectively. Both hands 'fly-back' in a retrograde fashion when they reach the end of their scale. Battery backup keeps time during power outages.