Shure BLX14/SM31-H11

Overview

The Shure BLX14/SM31-H11 is a wireless cardioid headset microphone system designed to deliver clear and reliable vocal performance in active and dynamic settings. Operating within the 572 to 596 MHz UHF frequency range, it minimizes interference and supports up to 12 simultaneous systems on the same band. The system includes a moisture-resistant SM31FH cardioid condenser headset microphone, a BLX1 bodypack transmitter, and a BLX4 tabletop receiver, offering up to 14 hours of battery life and a wireless range of 300 feet line-of-sight. This setup is well suited for fitness instructors, presenters, and performers who need hands-free, consistent audio while moving freely.

Key features

• Cardioid condenser headset microphone that focuses on the speaker’s voice while reducing background noise
• Moisture-resistant microphone capsule fabric to withstand sweat and active use
• Up to 14 hours of operation powered by two AA batteries for extended sessions
• Wireless range of up to 300 feet line-of-sight, allowing freedom of movement in large spaces
• One-touch frequency scan with access to 123 channels for quick and easy setup
• Receiver equipped with both XLR and 1/4 inch outputs for compatibility with various sound systems
• Supports up to 12 wireless systems operating simultaneously on the same frequency band, ideal for group events

Key specs

• Frequency range: 572 to 596 MHz (H11 UHF band)
• Microphone type: SM31FH cardioid condenser headset
• Battery type: 2 x AA batteries
• Battery life: up to 14 hours
• Wireless range: up to 300 feet line-of-sight
• Receiver outputs: XLR and 1/4 inch
• Number of channels: 123
• Simultaneous systems supported: up to 12 per frequency band

Connectivity and compatibility

The BLX4 tabletop receiver offers versatile connectivity options with both XLR and 1/4 inch audio outputs, making it compatible with a wide range of professional sound systems and mixers. This flexibility ensures easy integration into existing audio setups for fitness studios, conference rooms, or performance venues. The system’s frequency range and channel selection help avoid interference, supporting stable wireless communication in crowded environments.

Ideal uses and environments

This wireless headset microphone system is a strong choice for fitness instructors, presenters, and performers who require hands-free operation and clear voice transmission while moving actively. Its moisture-resistant design and long battery life make it well suited to high-energy workout classes, stage performances, and public speaking events. The ability to run multiple systems simultaneously also benefits group sessions and multi-speaker setups in gyms, studios, or event spaces.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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