The 21.02.10 from Hytem is a USB Controlled Digital Phase Shifter that operates from 2900 to 3900 MHz. It has a phase shift range of 0-360 degrees with a step size of 5.625 degrees. The phase shifter can handle an input power of 30 dBm and has a VSWR of less than 1.6:1. It requires a DC supply of 5 V, has a USB control interface, and a LED display. The shifter is available in a module that measures 73.6 x 69.2 x 18 mm with SMA-female connectors.