JBL T110 headphones are lightweight, compact in size, and are perfect for those who prefer to listen to music on the move. The plug-in vacuum ear pads fit securely in the ear without falling out or causing discomfort. Frequency range from 20 to 20,000 Hz, impedance of 16 Ohms - these are the acoustic characteristics that are responsible for surround, balanced sound. The JBL T110 is designed with function keys and a microphone to make using the headphones easier. The set includes three pairs of replaceable ear pads for long-term use.