To the best of my knowledge: Only Best Buy uses the 4271 model #, it's really the model 4270 and BB adds a 1 at the end. I've been looking for a long time ( research ) at different stores and they all use the 4270 model except BB who calls it a 4271
See D-Nice's video settings for the 4270 under the post for 6th and 7th generation settings. He did a LOT of homework. The 4270 is a 7th generation