I am using XR library with openVR in Unity 2019.1.10f1. I have a tracking system with 4 lighthouse sensor + 6 vive tracker(2018), without headset. In SteamVR Panel, I can see 11 devices icons. null headset("H") + 4 lighthouse sensor + 6 vive tracker(2018) I can only get 9 input devices as maximum, is this a limit? Those 9 input devices follows the order of "serial number of hardware". It means, I can always detect first 9 devices by their name order. In my case, I can only detect 3 lighthouse sensors and 5 vive trackers and a generic headset(null). however, I want to get 6 trackers only. If 9 devices are the limit, can I ignore unnecessary devices like lighthouse sensors? my first thought is trying to reorder the devices in steamvr, but I didn't find the related option. Below is the code: Code (CSharp): var inputDevices = new List<InputDevice>(); InputDevices.GetDevices(inputDevices); DevicesCount = inputDevices.Count; Hope someone can give me some hints, thank you.