Detachable In-Ear Headphones. Features: Detachable Cable Design - the F5 is equipped with MMCX connectors and comes standard with a 3.5 single-ended audio cable. Intelligent Control - Hi-Resolution Audio Certified for frequency response up to 40 kHz; MFi certified microphone and in-line controls work perfectly with iOS and most Android devices. Aerospace Materials Achieve Exquisite Sound - Utilizes a titanium driver diaphragm which is lighter yet more rigid, allowing the F5 to deliver far superior transient response, dynamics, and a wonderfully rich yet delicate sound. Contents - Comes with 6 pairs of silicone ear tips: 3 pairs of black ear tips and 3 pairs of mixed-color ear tips; a waterproof case to store your earphones in. Specs: Frequency Response: 20 Hz ~ 40 kHz. Sensitivity: 102 dB/mW. Impedance: 32 Ω. Weight: about 21 g.