Advanced noise-cancelling microphone and enhanced speakers deliver crystal-clear calls even in noisy offices. Speaker software separates noise from speech, reducing user stress. All incoming calls can be adjusted to a user-defined sound level that stays constant for all day comfort. Patented pairing. 256-bit AES encryption. 128-bit authentification. DECT Security Level C. The busylight acts as a do-not-disturb sign for colleagues. Up to 9 hours' talk time - and when you do need to charge, the fast charge feature powers the headset to 40% in just 30 mins. Intuitive touchscreen base for ease of use, showing connected devices, battery life and call controls.