BLF-01 is a sound insulation equipment professionally provided to lawyers, consultants, and other special professionals. Based on the protection of their communication, the wall design is a 4-layer structure on 3 sides. It has good external sound isolation effect, allowing users inside the cabin to minimize the interference of external sounds; at the same time, its internal sound isolation effect is also good, which can ensure that the sound information of users in the cabin has been transmitted to the outside of the cabin greatly weakened and difficult to capture effective sound.