Like the UM410, the UM410B has ten four-way mults, grouped into pairs, with a normally closed connection between them. The 'B' model, however, has the right-most 3.5mm jack replaced with a banana jack, allowing the 4-way mult to also function as a banana-to-3.5mm converter. The mult-pair acts as a 6-way 3.5mm mult with two bananas.
The UM410B ships with one RMS-1 screw set.