Shure ANX4-4CL is a 4-channel license for the ANX4 scalable wireless receiver. Once purchased, ANX4 channel licenses can be activated in one ANX4 and later removed and activated in a different ANX4. This is especially beneficial for users who own multiple ANX4 units serving various needs that change over time. Shure ANX4 delivers innovative, space-saving hardware, award-winning wireless audio features, and the ability to scale to the number of wireless channels your project demands.