Features: 1, mechanical, no need battery and power supply 2, keyless but by codes entry 3. Mortice deadbolt and tubular lock case are compatible. 4. Set up new codes within 10 seconds without removal of lock from door. Picture dia6 to know how to set up new codes) 5, master key can be provided according to customer's requirements. 6. Backset available:60--70mm. 7. Suitable for door thickness around 35--55mm