The ACM-500 pro series headphone is designed for educational use.
Features include a volume control on/off and coiled cord.
Features and specifications:
Full size soft Leatherette headband
Soft leatherette ear cushions
Rotary volume controls
9' shielded cord
>3.5mm gold plated stereo plug
>6.3mm gold plated stereo plug
40mm dynamic drivers
Frequency response: 20-20,000 Hz
Impedance: 32 ohms
Reseller Packaging information:
Dimensions: 6.75 x 4.00 x 7.25 (inches)
Weight: 0.75 lbs.
Dimensions: 21.25 x 15.50 x 14.60 (inches)
Weight: 18.0 lbs.