Cable microphone is mounted on a pay phone! Canal phones in two colors! Speaker unit Units: * Type: Canal (canal) * Driver size: 10 mm * Type: Dynamic Cable: * Length: 1.2 m * Shape: symmetry (Y-shaped) Plug: * Shape: straight * Diameter: 3.5 mm * 4-pole jack Remote Control: * Mike (talk) Compatible Models: * All smartphones that use the 4-pole jack American Main Specifications: * Sound Pressure Sensitivity: 100 dB / mW * Resistance: 16 Ω * Playback frequency range: 20 ~ 20,000 Hz Includes: * Replacement cap 4 pairs (one pair including default) * Pouch Weight: 4.7 g (without cord)CRESYN