Quartz crystal resonators can be divided into HC-49U, HC-49U/S, HC-49U/S·SMD, UM-1, UM-5 and columnar crystals according to their different appearance structures.

HC-49U is suitable for electronic products with wide space, such as communication equipment, televisions, telephones, and electronic toys.

HC-49U/S is suitable for all kinds of thin and small electronic equipment and products where the space height is restricted. HC-49U/S·SMD is a quasi-surface-mount product, suitable for all kinds of ultra-thin, small computers and electronic equipment.

Columnar quartz crystal resonators are suitable for frequency-stabilized timing electronic products such as timers, electronic clocks, calculators, etc., in a small space. UM series products are mainly used in mobile communication products, such as BP machines and mobile phones.