The Wi fi is built in on the GOpro 3 so you do not need the Wi-Fi back pack, you only need the remote. you can use your smart phone/ android or i-phone to control the camera and the app is free
By Allen B on December 16, 2012
I was going to buy this when it was $80 too, but now that it's $105, no way. Now that the GoPro app is out, you can buy just the WiFi BacPac for $67 and your phone/iPad will work as the remote.
By D. Brett on November 14, 2012