Adel Three-in-one Biometric Fingerprint Door Lock- Capacity of 120 Fingerprints, Compatible with Both Left or Right Opening Doors, Emergency Keys and Free DIY Tools Included, Professional Security for Home/office Two more lock cylinder,1 hammer,1 screwdriver,1 drill,1 file--Teach You Set it up Step by Step, Totally DIY , no more cost. Fingerprint+password+mechanical Key Three in One Lock--Triple Protection Low voltage warning--When the battery is used out, can be connected with external adaptor Maximum 120 fingerprints For home doors, office doors, manager office doors, financial room doors, medicine warehouse doors, archives office doors