QingDao Leff Technologies Co., Ltd is a high and new technology　company who develops researches, produces and sales Intelligence cards management system. Our mainly produce:Hotel Intelligence Door Locks, Intelligence Card Locks, Feeling Locks, Electronic Locks, Code Locks, Intelligence Card Attendance and Charges Systems. Our intelligent products are widely used in hotels, restaurants, apartments, high class clubs, intelligent gardents, intelligent buidings, offices, factories, etc. We persist in the principle of quality is the highest, strictly operates under the ISO9001. Our porducts are better than National Police Security department’s standards.　 We offer the excellent products and perfect post sale services by holding the principles of reative, reputation, mutually beneficial, development, We sincerely hope to provide the best services which will help all old and new customers forward the new level of technologize and interlligentize.