Compatibility: The wireless receiver is used to pair the following devices with PC VR Settings, fit for controller, for Vive tracker, for Vive Controller, for VR Ink Pilot, for N7R tracker ( 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 , so you can easily take it with you and use it outdoors. Plug and Play: Just insert into your computer and the necessary drivers 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.