This mouse is a "low-power bluetooth" device. Supposedly this uses HOGP instead of HID.
I have found responses that say you need bluez 5.x. Well Ubuntu 15.10 has bluez 5.35 but it doesn't work. When you try to make a connection, it identifies the mouse as "any device" and won't connect. I have a Surface Pro3 running either the distributed kernel for Ubuntu 15.10 or a more useful kernel that I have built myself based on a patched linux 4.3–the mouse behavior is the same for either. THe hardware is by Marvell. The mouse works perfectly when used in the Windows 8.1 partition.