Stereo Bluetooth headset with back-hang style Foldable design provides maximum portability * Features Software & CVC echo/noise cancellation for reducing noise Wirelessly enjoy stereo music from all A2DP-enabled devices, such mobile phones, PDA, PC etc Switch automatically from remote controls on the headset allow you to play, skip and select your music tracks. Extended music playback time * The latest version of A2DP1.2 and AVRCP1.0 profiles supportSupports Bluetooth Headset and Hands-free Profile(HFP 1.5) RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band * Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm * Frequency Response: 20 Hz - 20 KHz, Very high Signal to Noise Ratio (SNR):95 Db, Total