1. The lock is made by solid brass & stainless steel expects electronic parts and the constitution is sturdy and endurable. 2. Stainless steel-one bolt& 4 latches of the lock-system, service the best protection. 3. To stop the operation, the lock should to be locked after 6 seconds. 4. Alarm-bell system. As per protective designs, threaten the criminal and avoid happening the bad. 5. Multi-electric plating coats and anti-rust. The surfaces of all are excellent and touched. 6. Certifications - ce rohs, the panels are proof fire, esd and electric shock (320, 000 watts). 7. Alkaline batteries aa (1.5v) / 4 units - to be used for more one year. 8. If the batteries-power shall be used up, the warning is sounding and reminding to replace. 9. The system can keep the last codes without the electric power. 10. Mechanical keyhole - for emergency, insert the reserve key to open the door. Ng:3280g Box:880g, 15(h)*39(w)*25(d)