The Sennheiser XS Wireless Digital XLR Base Set (Model 508491) is a plug-and-play digital wireless audio system designed to turn any standard dynamic XLR microphone into a wireless setup without needing bulky bodypacks or belt clips. Operating on the 2.4 GHz digital band, it acts as a direct wireless cable replacement for singers, presenters, podcasters, and mobile DJs. [1, 2, 3]Key Hardware & Design

• Transmitter & Receiver: The set includes two compact, lightweight cylindrical adapters with a matte black finish: an XSW-D XLR Female Transmitter (which plugs directly into the bottom of a dynamic microphone) and an XSW-D XLR Male Receiver (which plugs directly into a mixing console, audio interface, or powered PA speaker). [1, 2]
• One-Touch Operation: Both units feature a single multi-function button with a built-in LED status ring. Pressing and holding the button powers the units on and automatically pairs them. A quick tap while connected mutes the audio from either the transmitter or the receiver. [1, 2, 3, 4]
• Color-Coded Labels: Included in the box is a sheet of colored stickers so you can easily match paired transmitters and receivers when running multiple systems at the same time. [1, 2]

Performance & Specifications

• Worldwide 2.4 GHz Transmission: Operates in the license-free 2,400–2,483.5 MHz spectrum, allowing you to travel and use the system globally without worrying about local frequency permits.
• Automatic Frequency Management: The system automatically scans for open frequencies and hops channels to avoid Wi-Fi or Bluetooth interference. Up to five XSW-D systems can be used simultaneously in the same space.
• Range & Latency: Delivers a line-of-sight operating range of up to 75 meters (250 feet) with ultra-low latency of less than 4 ms using the aptX Live codec, ensuring there is no noticeable audio delay.
• Battery & Charging: Both units have built-in rechargeable 850 mAh lithium-ion batteries that provide up to 5 hours of runtime on a full charge (which takes about 3 hours via USB-C). They can also be powered or charged during use via a USB power bank.
• Important Compatibility Note: The transmitter does not supply 48V phantom power, meaning it works natively with dynamic microphones or self-powered (battery-operated) condenser microphones, rather than standard phantom-powered studio or shotgun mics.