Sennheiser IE 400 Pro CL, Dynamic In-Ear Monitoring Earphones, Impedance: 16 ohms, Total harmonic distortion at 1kHZ: <0.08%, Frequency range: 6 - 19,000 Hz, Attenuation: <26 dB, Sound pressure level at 1 kHz: 123 dB (1kHz / 1 Vrms), Transducer principle: Dynamic, Cable length: 1.3 m, Weight: 18 g, Colour: Clear, Includes 3 silicone earpieces (S, M, L), 3 foam earpieces (S, M, L), 1 transport case, 1 cleaning tool, 1 6.3 mm jack adapter