True Powerful Bass. Driver sensitivity 100±3dBSPL, 1mW. Premium matallic finish with better & Ergonomics. Troubleshooting step: Kindly ensure 3.5mm port on Host device is clean and dust free and 3.5mm jack of the earphone is adequately inserted inside the Host device port, Maximum SPL 5mW. Rated power input 3mW Noise Cancelling Microphone Quick Launch Access to Google Assistant / Siri One-Button Universal Remote with Mic Lightweight and Comfortable with 3 sizes of ear tips What's in the box : 1 pair JBL C200SI headphone, 3 sets of ear tips (S, M, L), 1 Warranty and safety card Frequency range - 20-20kHz