Panasonic RP-HT260-K Sealing up type Stereo Headphone 40mm RPHT260 Black GENUINE GENUINE and ORIGINAL Packing same as Pictures High- quality design that employs a high-performance driver unit with a large diameter 40mm I adopt a useful counter-rotating one ear monitor mechanism to AV editing If you reverse the housing , the AV editing , use of in one ear monitor is easily enjoy . Adopt about 3.5m cord suitable for home use