Measurements by Hangout.Audio Experience superior sound with advanced electroacoustic technology and scientific acoustic architecture, featuring a patented dynamic driver structure. The earphones boast an internal and external composite magnetic circuit, independent brass cavity, and a new ceramic-coated spherical dome composite diaphragm for enhanced treble and resolution. Encased in alloy-casted precision-milled housing with a replaceable brass CNC-milled acoustic nozzle, they offer effective pressure venting for optimal performance. Combining scientific theory and subjective listening, these earphones deliver ultra-low distortion and detailed sound, complete with a high-quality single-ended cable. What You Get Moondrop Aria 2 IEM (10mm DD) Detachable cable Interchangeable 3.5mm single ended and 4.4 balanced connectors for universal compatibility 3 Pairs of silicone tips of a variety of sizes (S/M/L) Premium leather IEM carrying case Specs Connectivity: 2pin Driver Configuration: 1DD Impedance: 33ohm Sensitivity: 122dB/Vrms