No thread remote controls the door bell
1.The packing form: inhaling to model
2.The gross combination weight: 0.2Kg
3.The music is selected: two sound stings rub-a-dub and the bell
4.Does not have the thread distance: 80 meters
5.Being easy to install, need not electric wire and alternating current
6.The numeric coding does not have the thread signal, in order to guard against mistake sound
7.Fit the international standard design not had the thread communication organisation
8.Launcher and bin separate by oneself.

Being fit for in building and small area, it is convenient to install, need not the electric wire, and it is not only practical but also handsome, they are the necessities of modern family.