Shure The GLX-D+ Dual Band Wireless Headset System features the versatile SM31FH Headset Microphone for spoken word applications and the GLXD4+ tabletop receiver.

The Shure GLXD14+/SM31‑Z3 is a professional digital wireless headset microphone system that combines Shure’s Dual Band GLX‑D+ wireless technology with the SM31 headset microphone. It is designed for clear, reliable speech reproduction in presentations, fitness instruction, active performances, lectures, and other spoken‑word applications. The system includes a tabletop receiver, a rugged bodypack transmitter, and a high‑quality cardioid condenser headset mic. Automatic frequency scanning and dual‑band operation help maintain dependable wireless performance. Rechargeable lithium‑ion power provides extended use without frequent battery changes.

Key Features

• Digital Dual Band Wireless – Operates on both 2.4 GHz and 5.8 GHz bands with automatic frequency scanning for clean channel selection and reduced interference.

• True Diversity Reception – Two independent receiver paths reduce RF dropouts for stable signal reception.

• Automatic Frequency Management – System scans and selects optimal channels, switching automatically if interference is detected.

• SM31 Headset Microphone – Cardioid, electret condenser capsule tailored for speech with integrated windscreen to reduce plosives.

• Rechargeable Lithium‑Ion Power – Included SB904 battery offers up to ~12 hours of continuous use with quick‑charge capability (15 min charge ≈ 1.5 hours).

• Tabletop Receiver with Display – Easy‑read front panel shows battery life and status; also provides front charging slot for battery.

• Balanced Outputs – Rear panel provides balanced XLR (mic/line‑switchable) and balanced 1/4″ audio outputs for flexible connectivity.