Circumaural, Closed-Back Design, 40mm Drivers, 10 Hz to 22 kHz Frequency Response, Comfortable Fit, 9.8' Single-Sided Cable, Relatively Lightweight at 7 oz, Standard 3.5mm Plug with 1/4" Adapter. The Roland RH-5 is a pair of headphones offering a closed-back circumaural design. These headphones feature large 40mm drivers to produce a frequency response of 10 Hz to 22 kHz. The sound is flat and balanced across the spectrum. A 9.8' single-sided cable provides you with plenty of slack. The standard 3.5mm plug and 1/4 adapter allow you to connect to a wide variety of consumer and professional audio devices. These headphones are a suitable accompaniment to Roland musical instruments such as V-drums and digital pianos.