A seller from yiwu market said that Fingerprint collectors is the most important part of fingerprint locks. There are 3 types of fingerprint collectors, the optical type, the capacitive type and the ultrasonic type. Almost all of the fingerprint locks use optical type, which can not be easily destroyed. The capacitive type is usually applied in bank systems. The ultrasonic type is still in researching. We has collected some fingerprint locks sold in Yiwu International Trade Mart as follows. Sales address for Yiwu locks: 2F, 2nd District, Yiwu International Trade Market.

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