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Technical Data: Drive unit:Moving coil dynamic speaker. Speaker size: 8mm. Magnet: Neodymium. Sensitivity: 101+/-3dB At 1KHz1mW. Frequency response: 18Hz-22KHz. R&L balance< 3dB(50Hz-6KHz 1mW). THD, total harmonic distortion: <3%. Impedance: 32 Ohm. Rated input power: 5mW. Maximum input power: 10mW. Cable: length 1.2m TPE Material. Plug: 3.5mm gold-plate. Accessories: Silicon eartips in size of S/M/L.