QX40 STEREO HEADPHONES These stylish and compact headphones offer excellent performance and are ideal for use with personal audio devices. Speaker | 40mmØ | Power | 100mW | Impedance | 32 Ohms | Sensitivity | 105dB (±4dB) @ 1kHz | Frequency response | 50Hz-16kHz | Connector | 3.5mm stereo plug | Lead length | 1.5m | |