6mm Micro Dynamic Driver Unit Princess Changle adopts a 6mm micro dynamic driver unit, professionally tuned to deliver a natural overall sound with a well-organized soundstage. Semi-Open Sound Tuning - Authentic Sound Reproduction Princess Changle features a semi-open design for the rear cavity, allowing better adjustment of airflow between the cavity and the eardrum. This relieves pressure in the ears, prevents the formation of a closed space that could deform the diaphragm, and results in transparent and open sound. Aluminum Alloy CNC Engraved Housing - Exquisite Craftsmanship Princess Changle features a 4-axis CNC engraved aluminum alloy housing with meticulous patterns. After polishing and multiple processes such as deburring and anodization, it presents a resilient and exquisite body. Semi-Open Sound Tuning - Authentic Sound Reproduction Princess Changle features a semi-open design for the rear cavity, allowing better adjustment of airflow between the cavity and the eardrum. High-Purity Oxygen-Free Copper Silver-Plated Wire - Enhanced Audio Quality Princess Changle's headphone cable is made of 4N oxygen-free copper silver-plated wire, enveloped in transparent PVC soft rubber. This guarantees fast signal transmission, significantly reduces signal distortion or loss. In-Line Control Function - Strong Practicality Princess Changle is not just a Hi-Fi earphone but also a practical and versatile accessory. It features a powerful in-line control function: 1. Single click: Play/Pause 2. Double click: Next song 3. Triple click: Previous song 4. Long press: Activate Siri Specification Product Name: Princess Changle - Single Dynamic Driver In-Ear Hi-Fi Earphones Driver Configuration: 6mm Dynamic Driver Unit Total Harmonic Distortion: <0.5% Sensitivity: 95.5dB+1dB (1kHz) Left-Right Balance: 1dB (1kHz) Impedance: 16ohm Frequency Range: 20Hz-20kHz Cable Material: Oxygen-Free Copper Silver-Plated Wire Cable Length: 1.2m ±5% Headphone Plug: 3.5mm Free: CSI ZONE Earphone Pouch