I bought DN-9006 / N, but not DN-9006 / B5-N which a priori the DN-9006 / N 5 copies given the announced weight. The author of the doc failed to tell B5 = Box of 5 this subject to a confirmation response to the corresponding question If so almost without hesitation to buy (except in special cases and if one has no need to 5 boxes) for the technical quality on top with a quality / price ratio unmatched. In Lot 5, 3-4 times cheaper than the competition. See my review of DN-9006 / N Unit is obviously twice as expensive.