The Zen Alarm Clock with booklet very nice condition 229 retail The Zen Alarm Clock's long-resonating Tibetan bell-like chime makes waking up a beautiful experience — its progressive chimes begin your day with grace. When the Clock's alarm is triggered, the acoustic chime bar is struck just once … 3-1/2 minutes later it strikes again … chime strikes become more frequent over 10 minutes … eventually striking every 5 seconds until shut off (see the chime progression graph, below). As they become more frequent, the gentle chimes will always wake you up — your body really doesn't need to be awakened harshly, with a Zen Clock you're awakened more gradually and thus more naturally.