1. WB4604A type is the most flexible electronic whiteboard, which is mainly applied to the common whiteboards, due to the different structures of the exterior frames of the common whiteboards, the installation of receivers can be divided into exterior angle installing and interior angle installing;
2. WB4604B type projecting electronic whiteboard is mainly applied to projecting televisions and LCD televisions, so its installation is the same as the exterior angle installing of the WB4604A type electronic whiteboard receivers, while installing, please see the installing instructions of the exterior angle installing of the WB4604A type electronic whiteboard receivers, in this section, we will not explain it again.