Behringer SD251-CL - dynamic In-Ear Monitoring Earphones; 6.8 mm driver; Impedance: 22 Ohms; Frequency response: 20 Hz - 20 kHz; max. SPL 105 dB; cable length: 1.6 m; 3.5 mm stereo jack; colour: transparent; incl. gold plated 6.3 mm adapter, foam and silicone ear-plugs in 3 sizes, zipper case