So tbenzie, you are correct. The SMH5 doesn't have any 3 or 4 way conferencing ability on its own. I guess that is the biggest thing going for the SMH10 these days other than distance, battery, and MP3 port on the mount. It still technically can be involved in a 3 way by connecting to an SMH10 or say that 2 riders on a motorcycle both have SMH10's and both passengers have SMH5's. With the two SMH10's linked in the middle, there could be a 4 way between the 4 of them. The SMH5 recently got the multipoint upgrade in v1.2, but that was it.