"Sound gate soundproof door technology from abroad, using the impedance of the sound screen principle, combined with the sound of the lock, starting from the actual use of the R & D, from the 2001 R & D into production in 2003, and the rapid development so far, has been formed standardization, serialization; and can be customized according to customer requirements; 
 The performance acoustic doors (sound insulation above the ordinary acoustic doors 20-25dB), delicate appearance, magnetic seal, switch light, praised by the majority of users. 

 Soundproof windows double vacuum glazing and acoustic lock production.