Panasonic Stereo Inside Phone (Silver) RP-HDE5-S

Adopts a highly responsive MLF diaphragm to faithfully reproduce the delicate sounds of high-resolution sound sources. (5Hz~45kHz) Adopts an aluminum body that achieves a high-quality metal feel. A compact body that fits in your ear provides a comfortable fit. Adjustable holder that allows you to adjust the cord to your desired length Comes with a carrying case for easy transportation Output sound pressure level (sensitivity): 110dB/mW