Thank you for viewing. This is a Panasonic wireless microphone system, the WX-UR502 and the wireless microphone WX-4100B. It has a built-in tuner, allowing the use of one wireless microphone. I have confirmed its operation with my own antenna, and all functions were working correctly. (Please note that the antenna is not included.) Regarding the condition: * WX-UR502 * Scratched, operation confirmed. * WX-4100B * Looks clean on the outside, but there is a crack inside (see image). * There are no problems with operation or use. That's the situation. This is a high-quality wireless microphone system, so please consider trying it out. Shipping is included. Thank you.