OYO Specialized in Manufacturing Smart Locks Since 1993, Which Own Its R&d, Manufacturing, Sales and Maintenance Departments. OYO Offering High Quality Products and Service All over the World. OYO’s Main Products Including Smart Card Lock, Fingerprint Lock, Facial Id Lock, Electronic Code Lock, Electronic Cabinet Lock, Bluetooth Lock, Cloud Lock, Electronic Cylinder, Elevator Reader, Hotel Safe Box, Energy Saver Switch, Etc. Our Products Have Got Ce, Ul, Bhma, Fcc, Rohs, En14846 Etc Quality Certificates. OYO Offers Odm, Oem Service Also.