Description Are you looking for a professional, yet affordable sleeping headset? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional sleeping headset must meet you needs. It is one of the best choices for you. Features - Color: Black. - Material: Silicone. - Size: 120 x 2 x 1 cm. - Sensitivity: 108db SPL/mW. - Frequency range: 20Hz. - Distortion: <1% 101dB(20 upa). - Rated power: 10mW. - Impedance: 16. - Built-in Microphone enables hands-free calls. - With in-line control, easy to control music and call. - Support for phone, MP3 player and other 3.5mm jack product use. - Silicone ear shell, and comfortable to wear, perfect for side sleepers, cause no ear ache. - In-ear design earphone blocks ambient noise to help you focus on listening pleasure and to help sleep.