Reliable and Durable: Each USB Dongle receiver for Valve Index Controllers is tested before shipment to ensure their function flawlessly. 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. Wide Compatibility: Used to pair the following devices with your PC VR settings: for Valve Index Controllers, for HTC Vive Tracking Device, for HTC Vive Controllers, for Logitech VR Ink Pilot, for N7R Tracking Device)NOT FOR REVVL 4 PLUS). Firmware: These dongles are pre flashed with for watchman firmware and function similar to for Steam Controller, or for HTC Vive tracking device dongles. Compact and Portable: This USB dongle receiver is compact in size and light in weight, so you can easily carry it with you for outdoor use.