These are the earbuds designed with German engineering by Sennheiser, a name long appreciated by audiophiles for a home listening experience almost like a live performance. The earbud’s 7mm transducers are crafted for improved control of diaphragm movements to provide crisp bass, dynamic mid-range frequencies, and natural treble for an immersive experience. They have flexible ear hooks and come with a variety of ear tips to provide comfort for all users. With an output impedance of 16 Ohms, frequency response of 6 Hz?20 KHz, and a sound pressure level of 124 dB. Includes detachable cables with a gold-plated 3.5 mm stereo plug. Case 5" L x 83/4" W x 21/4" H. (8 oz.)