Sennheiser EK 100 G4 Camera-Mount Wireless Receiver (A1: 470 to 516 MHz)

The Sennheiser 509518 is a camera mount wireless receiver created for the Evolution Wireless G4 family and tuned to the A1 band between 470 and 516 MHz. It delivers clean, dependable audio to filmmakers, mobile journalists, and content creators who need a rig that stays light while capturing clear dialogue and sound effects.

A housing made from aluminum keeps the receiver protected without adding bulk, and the included shoe mount adapter lets it sit securely on DSLRs, mirrorless bodies, or cinema cameras. A bright, high-contrast LED display shows battery status, RF strength, and audio levels in real time, so you can make quick adjustments even under direct sunlight.

The unit maintains a working range of up to 330 feet by using adaptive diversity reception, a technology that actively selects the strongest signal path to reduce dropouts and interference. Setup is equally straightforward: auto-scan finds an open frequency, and one-touch infrared sync pairs the receiver with any compatible EW transmitter in seconds.

Power comes from two AA batteries or the optional rechargeable pack, giving up to eight hours of continuous operation. Both 3.5 mm and XLR output cables are in the box, allowing fast connection to cameras, field recorders, or mixers. Compatibility with every previous Evolution series transmitter means you can expand an existing kit or replace an older receiver without changing the rest of your gear.

From run and gun documentaries to fast-moving event coverage, this receiver provides a reliable wireless link that keeps the focus on the story rather than the equipment.

• Housing made from aluminum that is durable yet light for on-camera use
• Operating range up to 330 feet under ideal conditions
• Runs up to eight hours on AA batteries or the optional rechargeable pack
• Auto-scan and infrared sync streamline frequency selection and pairing
• LED display remains easy to read outdoors and in low light
• 3.5 mm and XLR output cables included for flexible connection options
• Works with all Evolution Wireless G4 transmitters and earlier G1, G2, G3 units