Upgrade any pair of AIAIAI's excellent TMA-2 headphones to high-definition wireless with the S11 and X03 bundle. AIAIAI's W+ Link protocol offers ultra-low latency, lossless sound. Supplier's Notes: Combine the upgrade kit with your headband and ear pads from any TMA-2 headphone to go wireless. Experience ultra-low latency wireless performance with more than 20 hours of battery life for uninterrupted sessions. Includes two S11 speaker drivers and the X03 W+ Link Transmitter. Fully compatible with the TMA-2 Modular system Ultra-low latency wireless audio for cable free performance Powerful, detailed sound tuned to clearly present bass and treble details in loud venues Seamlessly switch between W+ Link for performing and Bluetooth for listening on the go Use the AIAIAI app EQ to shape the sound to your preference