Reciprocity is a fundamental principle of wave physics and directly relates to the symmetry in the transmission through a system when interchanging the input and output. The coherent transmission matrix (TM) is a convenient method to characterize wave transmission through general media. Here. we demonstrate the optical reciprocal nature of complex media by exploring their TM properties. https://www.markbroyard.com/special-deal-sally-hansen-insta-dri-midnight-drive-supply-super-offer/