Advanced noisecancelling microphone and enhanced speakers deliver crystalclear calls even in noisy offices. Speaker software separates noise from speech, reducing user stress. All incoming calls can be adjusted to a userdefined sound level that stays constant for all day comfort. Patented pairing. 256bit AES encryption. 128bit authentification. DECT Security Level C. The busylight acts as a donotdisturb 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.