/nordic/nordic-blog/b/blog/posts/one-minute-to-understand-ble-mtu-data-package1.Profile MTU: ATT Maximum Transmission Unit (MTU) is the maximum length of an ATT packet. The ATT MTU is defined by the L2CAP and can be anywhere between 23 and infinity. The implementation of the Bluetooth stack is the key factor of determining then-USTelligent Community 13