Canon PGI-2400XL Black Inkjet Cartridge Compatible with MB5440,5340, 5140, 5040, IB4040

295g lightweight design: Lightweight ergonomic design, no feeling of pressure when usedAudiophile speaker unit: Using high-fidelity 50mm speaker unit, stable output, clear and thorough sound qualityNoise reduction microphone: Excellent noise cancellation technology to reduce the interference of external sounds. It is good to listen to the direction of gunfire, and the sound of footsteps far and nearAdjustable headband: The size of the headband can be flexibly adjusted according to your own needsPrecise wire control design: Just press the switch, the volume can be adjusted accurately