Groupon offers the Belkin Screencast Intel WiDi Wireless Display Adapter, model no. F7D4501, for $39 plus $3 for shipping. That's $9 under our mention from last week and the lowest total price we could find by $34. This adapter connects to your TV and allows you to wirelessly transmit content from your WiDi-enabled Windows laptop. It supports 1080p video and 5.1-channel audio and features an HDMI output. Deal ends June 11.