Compatibility: The wireless receiver is used to pair the following devices with PC VR Settings, fit for Valve Index controller, for Vive tracker, for Vive Controller, for VR Ink Pilot, for N7R tracker (not available for REVVL 4 PLUS) Extension Cable: The USB extension cable provides additional flexibility in setup, offering enhanced convenience for users based on their spatial needs. Portable: This USB dongle receiver is compact and lightweight, so you can easily take it with you and use it outdoors. Plug and Play: Just insert into your computer and the necessary drivers will automatically install so you can pair your controllers using for SteamVR app. Color:White Material:plastic Package Contents: 2 * VR Dongle Receiver Adapter 2 * USB Extension Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.