D'Addario Organic Reserve 5 Pack Tenor Saxophone Reeds ODKR0530 #3 24" The spacious main backpack compartment The spacious main backpack compartment accommodates textbooks the U45's AutoScan function automatically scans each available channel for the best connection and sets your transmitter and receiver's channel accordingly to ensure optimal reception in any work space D'Addario has pioneered the first practical and precise system to digitally measure and cut the incredibly complex geometrical patterns necessary to re invent single reeds Each reed in the pack comes single sealed in a recyclable paper reed holder and flow wrap