Plantronics Replacement Monaural Headset with Cradle for W710Features include:-Spare headset for monaural style W710-Not interchangeable with CS510-Noise cancelling microphone with up to 350ft hands free roaming range-Enhanced Digital Signal Processing (DSP) provides more natural sounding voice-Outstanding audio quality with DECT technology-Comes with leatherette ear cusion that seals in sound-Includes battery and charging cradle