Can I trade in my Hummingbird Duos for Hummingbird Bits? Matt Hrydil March 04, 2019 03:12 Updated Follow Yes, if you bought your Hummingbird Duos within the last 30 days and they are in resalable condition. See our return policy for more information. Related articles What is the difference between the Hummingbird Bit and the Hummingbird Duo? Why do I need a Bluetooth USB dongle for the Hummingbird Bit? Can I upgrade my Hummingbird Duos to function like Hummingbird Bits? What power sources can I use with the Hummingbird Bit or Duo Controller? I already have Hummingbird Duos. Should I buy Hummingbird Bits to add to them? Comments 0 comments Please sign in to leave a comment.