Foldable. Features: Light-weight, stereo headphones. Ideal for all portable stereos, boom boxes, cassette players and CD players. Dynamic sound reproduction from all sources. Adjustable locking headband. Specifications: Type: Light-weight. Driver: 30 mm. Impedance: 32 ohms. Magnet: Anisotropic Ferrite. Film: 0.012 mm. Coil: 13.6 mm. Sensitivity: 100 dB (+/-) 3 dB. Channel Balance: - 3 dB. Rated Input: 40 mW. Maximum Input: 100 mW. Frequency Response: 20-22,000 Hz. Plug: Nickel Plated 3.5 mm L-Plug. Cord Length: 4 ft. Weight: .19 lbs. Model No. HP-200F. Item No. 190318. Made in China.