KILBY. Headphones - Adjustable ABS and PP headphones with microphone. They include 4-button audio controls: volume up/down, microphone mute and mute. Frequency response 20 Hz-20 KHz, impedance 32 Ω, 1.85 m cable and USB A connector. Supplied in a black gift box - Adjustable ABS and PP headphones with microphone. They include 4-button audio controls: volume up/down, microphone mute and mute. Frequency response 20 Hz-20 KHz, impedance 32 Ω, 1.85 m cable and USB A connector. Supplied in a black gift box. 170 x 185 x 75 mm