Sennheiser SC 45 USB CTRL is a single-sided, wired headset offering both USB and 3.5 mm connectivity.The dual connectivity is provided via the headset's 3.5 mm jack and a detachable USB cable, allowing connection to smartphones, tablets, etc. as well as PC.A flexible headset solution for mobile office professionals optimized for Unified Com - munications.Sound leadershipWith Sennheiser Voice Clarity and a noise- cancelling microphone, the SC 45 USB CTRL optimizes speech intelligibility in noisy environments to deliver a more natural conversational experience during calls for both caller and listener. Sound enhancement profiles adjust automatically for optimal communication or multimedia use.Quality designWith its contemporary styling, the SC 45 USB CTRL looks good from front-desk to video call. A lightweight headband with leatherette padding flexes and adjusts for a personalized fit and a bendable boom arm positions the microphone perfectly.User focusWith its dual connectivity options via either 3.5 mm jack or USB plug along with its instant-fit features and choice of acoustic foam ear pad or soft leatherette cover, the SC 45 USB CTRL immediately provides users with a flexible UC headset solution with superior comfort. Features an ergo - nomic in-line call control unit for easy call management and Sennheiser ActiveGard® technology to safeguard users from acoustic shock. A carry pouch for transport or storage protects the headset when not in use.