The HP-660M educational headphone delivers a comfortable and high-quality audio experience.

• Acoustic Driver : 40mm
• Impedance : 32 Ω
• Sensitivity : 100 ± 4dB
• Mic Sensitivity : -62 ± 4dB
• Cord : 6 ft. Straight Cord
• Plug : 3.5mm Dual Stereo Nickel-Plated 

• Durable & retro design
• Clear sound in all range
• Comfortable fit