This is the Moondrop Chu 2 earphones. I am selling them to declutter. I've only listened to them a few times, and there are no noticeable scratches or stains. They produce good sound, even among entry-level models. ■ Driver 10mm high-performance dynamic driver ■ Diaphragm Aluminum-magnesium alloy composite diaphragm ■ Sound Pressure Sensitivity 119dB/Vrms (@1kHz) ■ Frequency Response 15Hz-38,000Hz ■ Cable Specifications ・Connector: 0.78mm 2Pin ・Plug: 3.5mm ■ Accessories ・Silicone ear tips (S/M/L) each 1 pair ・Earphone pouch