Omnidirectional boundary microphone AT9921, with a mono power module. The directional switching and lightweight design are convenient, and the microphone cord (cable) is approximately 1.6m long, making it suitable for community meetings and small-scale recordings. - Model Name: AT9921 - Type: Boundary Microphone - Module: Mono Power Module - Connection Type: XLR Connection - Directivity: Omnidirectional It works without any problems. Audio test confirmed on Zoom on December 24th (see photos). Please consider this item as a used product inspected by an amateur. The tab for hanging display on the original box is torn, but the main unit was stored at home in the box, so there are no noticeable scratches. Thank you for viewing.