Awei es-390i explosive bass high performance in-ear headphone es - 390i headphone provides you with great sound quality, super bass. Suitable for all kinds of electronic devices with 3.5mm jack port. Powerful neodymium magnet unit design, with noise isolating hi-definition technology, you will enjoy the excellent sound. The headphones surface paints with piano uv and strong ultraviolet curing, it makes the color bright and fresh. Specification : driver unit : 10mm sensitivity : 92db ± 3db impedance : 32ω ± 15% plug type : ø3.5mm frequency response : 20 ~ 20000hz cord length : 1.2m