Sennheiser Momentum 4 Bluetooth Headset Black (509266) is a premium over-ear wireless headphone designed for everyday use and travel. It features Bluetooth 5.2 for stable and energy-efficient connectivity. Active Noise Cancellation (ANC) and Transparency mode allow flexible control of surrounding sounds. Voice control and the built-in microphone ensure convenient and clear communication. It offers up to 60 hours of battery life for extended use.