Sound Isolating Designed for the mobile music generation, these Jivo earphones are the perfect choice for enjoying your music on the move. Reduce irritating background noise by up to 70% Lightweight, high quality design Ideal for use with all MP3 players and any audio devices with 3.5mm stereo headphone sockets Normal input power: 3mW Max. input power: 20mW Impedence: 16Ω ± 15% Sensitivity: 90dBC ± 3dB at 1mW Frequency response: 20Hz – 20KHz