Detailed Product Description Anviz optical sensor: reliable performance Elegant and stylish design Ripeness circuit system, good stabilization Power-saving function: dormancy if fingerprint fail for 5 times or no operation for 5s Automatic door opening function External battery available if internal battery runs out Emergency mechanical key in case of malfunction Box material: S45C Dimensions: 195mm x 400mm x 410mm (can be customized) Fingerprint storage capacity 8 (extendable)