Massdrop X MEE Audio Pinnacle PX IEM In-Ear Earbud Headphones, NOB Contents: Accessories in Retail Box. New Opened Box Condition. Specs Massdrop x MEE audio Ear coupling: Intraaural Housing: Zinc alloy with dark blue PVD finish Driver: 10 mm dynamic moving coil with copper-clad aluminum voice coil Frequency response: 20 Hz–20 kHz Impedance: 50 ohms at 1 kHz Sensitivity: 96 dB +/- 3 dB (1 mW at 1 kHz) Microphone directivity: Omnidirectional Microphone frequency response: 100 Hz–5 kHz Microphone sensitivity: -40 dB +/- 3 dB Cable: 51 in (130