CCA C10 Hybrid Technology, 1 Dynamic Driver & 4 Balance Armature Driver, CCA C10 Earbuds have a wide frequency of 7Hz -40000Hz. High fidelity stereo sound, powerful bass, open mid-range, clear treble, and many vocal details Music just for you. 【Durable Zinc Alloy Shell + Resin】 Super lightweight yet durable zinc alloy shell + resin high quality features match the foam. Combined with sophisticated craftsmanship for a sleek, rugged look. The CCA C10 is ready for any condition, whether at the bottom of your gym bag, or for casual listening. Lightweight, ergonomic design provides extra flexibility, portability and durability. Perfect for running, jogging, hiking, cycling, gym and so on. 【PROFESSIONAL TUNING】 Precision tuned for perfectly balanced ultra-realistic sound, high definition 10mm drivers can produce premium acoustic quality. Any volume will not affect your experience. You can always hear crystal clear treble and bass (Connectable Cable Design) The earbuds are designed to be removable. 0.75mm gold plated 2-pin low impedance braid wire enhances sound quality. 5N 4 core silver plated wire is included on the body. Soft and supple material makes it easy to handle and you don't have to worry about the cable curling. Extremely lightweight yet durable and can stand up to long term use. Removable and interchangeable with other Bluetooth cables.