This is one of the best pedometers you can buy and the price on Amazon is very reasonable. The unit is a little larger than some other PM's, but light. I usually clip mine on my belt, be sure to use the safety lanyard. Very accurate, I make most use of the steps counted and the aerobic steps taken. As with all pedometers, the calories burned and distance traveled are estimates.It is absolutely quiet, no rattles or clicking noises at all.
This is a pizeelectronic device and consumes more battery power. But it is is more accurate in counting steps taken at a slower pace than spring-levered PM and wont wear out as fast. With a spring levered PM the spring will start to wear out after 1 - 1 1/2 years. You wont have to keep buying new pedometers, buy you will need to keep buying batteries. Look for a good deal on batteries and keep several on hand. Battery should last about 6 months and the battery has a shelf life of 5 years. If not used, it can sit for 5 years and still be good.
You cannot buy a better pedometer at or near this price. I am happy with mine and would not hesitate to buy another. One of the best deals on Amazon and has been one of Amazon's top sellers in the health field.