In addition to fingerprint identification to unlock it, the product features the highly secure iris recognition technology, which offers a high degree of information security. Besides its rich extended interface, it can be used with a variety of external functional modules, such as an identity card identification system, a recording instrument for law enforcement or a bar code scanner. These modules can be added, depending on the individual demand of the user; therefore, the basic purchasing cost is reduced and the product achieves the highest utilization rate. The body uses an IP68-grade waterproof treatment, making it waterproof, dustproof and drop-resistant, to adapt the product to a variety of harsh working environments.