This is a set of two items: a 2K4K8K-compatible mixing (splitting) device and a splitter plug (splitter) from DX Antenna. It can be used to separate or combine terrestrial digital TV and BS/CS broadcast signals. Made by DX Antenna and compatible with 2K4K8K, so the quality is good and it should last a long time. MBURS(B) was 3,180 yen (Elecom Main Store) and 1,980 yen (Amazon). MBUGS(B) was 2,880 yen (Elecom Main Store) I bought these for home use, but they are unused. Thank you.