The Shure SLXD35+-G57 is a portable digital wireless plug-on transmitter system designed for professional audio engineers, field recordists, filmmakers, and broadcast teams who require flexible, high-fidelity wireless integration with handheld microphones or boom setups. With cutting-edge digital performance and mobile-friendly design, this system enables wireless audio capture with studio-grade quality and camera-ready portability. At the center is the SLXD5+ portable digital receiver, which mounts easily to cameras or audio bags and offers Bluetooth remote monitoring and control, AES-256 encryption for secure transmission, and Digital Feedback Reduction (DFR) to maintain clean audio even in crowded RF environments. A USB-C port supports charging and external power, while Multi-Mic Mode allows streamlined management of multiple transmitters. The unit also includes a headphone monitoring jack and comes with locking 3.5mm-to-XLR and 3.5mm extender cables, as well as a cold shoe mount adapter for direct camera integration. The system includes the innovative SLXD3+ plug-on transmitter, which features a patented wobble-free locking ring, switchable 12V/48V phantom power, and external USB-C charging which makes it suitable for use with both dynamic and condenser microphones. It also supports 24-bit / 48 kHz digital audio, 118 dB dynamic range, high-pass filtering, and Bluetooth firmware updates. Power is provided via 2 AA batteries or the optional SB903 rechargeable battery, with up to 8 hours of runtime.