The Roger On In, I believe installs 2 Roger (Type 3) licenses into your aids, so unfortunately of no use to you whatsoever with Roger Pass Around the Mic, as @Zebras rightly stated, the RPATM, also needs the Roger Touch Screen, this is a (Type 2) device, and in order to function, it connects to your aids via the Touch Screen, I have all of this equipment, and more besides… I reiterate you would also need 2 x Roger X Receivers that are (Type 2) Educational, or the (Type 2) Neck Loop, to me it would be a mistake to buy the Roger On In, unless it’s a freebie, it is fine 1 to 1, or as a table mic, with say half a dozen folks sat around, but I think you may struggle in a classroom? As a rule of thumb, (Type 2) Receivers are classed as Educational, and as such they are usually double the price, they work with every Roger device, as long as the serial number is above 1744… (Type 3) Roger X Receivers only work with certain ALD’s, like Roger On, Roger Select, Roger Pen… There are 2 licenses slots in either aid (I have both Type 2 & 3) Receivers, and one day I accidentally installed an extra receiver in an aid, 1 of each type I thought I had bricked it! (Type 2) give you a License for any Roger device, (Type 3) is only a license for certain devices, but be aware these licenses aren’t interchangeable, well the (Type 3) most certainly isn’t! My apologies for the long winded reply, it’s a difficult subject to try, and explain, but in reality it is a very simple thing… Good Luck, cheers Kev