Sennheiser MX W1

Weight: 10 g
Design: Liners
Description: Design: in-ear, device type: wireless headphones, operating time: 10 h
Additional Information: Cross-country power adapter, USB charging cable, signal / noise - 80dB; Battery type: own Li-Ion; Transmitter frequency range: 2.40-2.48 GHz; Range: 10 m; Replaceable ear pads: yes
Harmonic coefficient: 0.5 %
Working hours: 10 h
Battery capacity: 40 mAh
Impedance: 32 ohm
Sensitivity: 115 dB
Charging time: 2 h
Device type: Wireless headphones
Mount type: Without attachment
Maximum playback frequency: 20000 Hz
Minimum repeatable frequency: 19 Hz
Technology: Dynamic
Membrane diameter: 14 mm