This waterproof metal fingerprint reader is designed for market needs. Although its design is small it possesses strong functions such as: relay 3A output so it can be used as a standalone and Wiegand eight burst output which can be used as a reader. More importantly is the advanced optical digitalization technology in this model, the sensor can work like a keypad for realizing managements. All operations are instructed by sound, the sound can be translated into several languages, such as English, German, Italian, Spanish etc.