Every SoundForm product undergoes 150 rigorous quality tests to ensure perfect sound quality before it reaches your ears. USB-C connector Easy control button Belkin Signature Sound 10mm drivers for immersive, high-fidelity sound Built-in microphone Durable, tangle-free 4-foot/1.2-meter cable All-day comfort with durable noise isolation Ear tips included in sizes S, M, and L IPX5 sweat and splash resistant Made with post-consumer recycled materials*