*intelligent auto-locking design. *temporary code design for unexpected use. *2 unlocking methods: card & override key. *code memory remains after battery replacement. *3 emergency override keys in case of emergency. *low battery alert: beeping when battery is running low. *metallic exterior that gives a more delicate appearance. *over one million sets of code possibilities to raise security. *stand-alone and wireless (easy, and effortless installation). 1864g per set
