This product is either discontinued or we cannot get that from suppliers.
SONY Wireless Lan Module Dongle IFUWLM3, Up to 4 Users Can Split Projected Image, For Classroom & Collaborative Workplace, Cable-Free Signals from Computer, Multiple Computer Support, Connect up to eight computers to the projector.
The Sony IFU-WLM3 Wireless LAN USB Module for VPL-E200 Series Projectors lets you project images without signal cables. This USB dongle is required for the projector to receive images wirelessly from Windows computers running.