Crystal (artificial crystal) clock. 'Matter is the crystal of time, and crystal is the streamer of time.' High-purity artificial crystal, transparent front and back, visually simulating the inner core of mechanical clocks and watches, which can be directly adjusted by hand. At the moment of gear rotation, the precision of mechanical interlocking completely restores the charm of mechanical models. No battery included. Gently curved top, mirrored glass base to complement your home decor. The clock's quartz movement makes a soft ticking noise for a quieter environment.