Type: In-ear style Noise-isolation: Passive Impedance: 16 Ohm Speaker sensitivity: 103 +/- 2dB at 1KHz Output max. 12mW RMS (with level limit) Total harmonic distortion <5% (1KHz, 1mW) Audio format: 16-bit stereo Codec: Bluetooth SBC implementation Response bandwidth: 20Hz – 20kHz Driver size: 6 mm