This is a single TRN conch earphone unit. It has been aged overnight, and I've confirmed that both sides produce sound properly. Cables are not included, so please prepare your own QDC cable. The connection points are also secure. Unopened, brand-new ear tips are included. The tuning filters are in good condition. This is a famous and popular model in this price range. If you are looking for monitor earphones, or if you already have a re-cable, why not give it a try? I will clean it with alcohol wipes and cotton swabs, take measures against rain, wrap it in cushioning material, and ship it. Thank you very much. m(_ _)m #TRN #RecableableEarphones #Recable #MonitorEarphones #ChineseEarphones #GoodCondition #Earphones