Yamaha EPH-20, Wired, 20 - 21000 Hz, 0.353 oz (10 g), Headphones, Green Yamaha EPH-20. Product type: Headphones. Connectivity technology: Wired. Headphone frequency: 20 - 21000 Hz. Cable length: 47.2" (1.2 m). Weight: 0.353 oz (10 g). Product color: Green