Feature: 1. APPLICABLE: Compatible with Valve Index Controllers, HTC Vive Controllers, HTC Vive Tracking, and VR Ink Pilot. (Not compatible with REVVL 4 PLUS). 2. INCLUDES USB EXTENSION CABLE: USB dongle receiver enables use with HP Reverb G2 headset and Valve Index Controller; includes USB extension cable. 3. PLUG AND PLAY: USB dongle wireless receiver is plug and play—simply connect to your computer for automatic driver installation. 4. PRE-INSTALLED FIRMWARE: USB dongle receiver comes with pre-installed Watchman firmware and functions similarly to the Steam controller. 5. SMALL AND PORTABLE: Steam VR USB dongle receiver is tested before shipping to ensure proper functionality. Compact and lightweight design for easy portability. Specification: Item Type: USB Dongle Receiver Material: ABS Compatible Devices: Valve Index Controllers, HTC Vive Tracking, HTC Vive Controllers, VR Ink Pilot (Not compatible with REVVL 4 PLUS) Features: USB dongle wireless receiver for pairing your PC with SteamVR-compatible devices, enabling use with HP Reverb G2 headset and Valve Index Controllers. Features: Plug into your PC for automatic driver installation, allowing use of the SteamVR app to pair controllers. Package List: 1 x USB Dongle Receiver (Neck Color Random) 1 x Extension Cable