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Derivation / doorbell


Derivative, integration of classical and modern elements, will have a bubble paper element alloy and mass of wood and very modern classical elements of the common Chinese combination, design in line with the current theme products. The group bell has three functions, one minute more than shout DB is greater than 80%, the alarm sounds. Ring the Bell once suggested a visitor. Ring the bell for the two consecutive opening message function. A large extent help at the door accidentally accident the elderly and those who have important things to visit but not the entry of the guests.


Hefei Normal University

Hefei Normal University
Hefei, China

Yi Zhou,
Hefei Normal University