Shure BLX14/SM31-H10

Overview

The Shure BLX14/SM31-H10 is a wireless cardioid fitness headset microphone system designed to deliver clear and reliable audio for active presenters such as fitness instructors, dance teachers, and public speakers. Operating in the H10 band between 542 and 572 MHz, this system includes a BLX4 tabletop receiver, a lightweight BLX1 bodypack transmitter, and the SM31FH headset microphone with a moisture-resistant capsule. It offers up to 14 hours of battery life on two AA batteries and a maximum line-of-sight range of 300 feet, making it suitable for large studios, gym floors, and small stages.

Key features

• Analog UHF wireless technology with 123 selectable frequencies to minimize interference and ensure clear sound.
• Cardioid pickup pattern on the headset mic that focuses on your voice while reducing background noise and feedback.
• Moisture-repellent microphone capsule designed to withstand sweat during intense physical activity.
• Supports up to 12 systems operating simultaneously within the same frequency band, ideal for multi-room or multi-event setups.
• Simple manual group and channel synchronization with LED indicators for quick and confident setup.
• BLX4 receiver offers both balanced XLR and unbalanced 1/4-inch outputs for versatile connection options to mixers, powered speakers, or recording devices.
• Compact design with internal antennas keeps the receiver footprint neat on desktops or rack shelves.

Key specs

• Frequency band: H10 (542 – 572 MHz)
• Selectable frequencies: 123
• Maximum line-of-sight range: 300 feet
• Battery type: 2 x AA batteries
• Battery life: Up to 14 hours
• Receiver outputs: Balanced XLR and unbalanced 1/4-inch
• Microphone pickup pattern: Cardioid

Connectivity and compatibility

The BLX4 receiver provides flexible connectivity options to fit various audio setups. Its balanced XLR output ensures professional-grade signal quality for mixers and sound systems, while the unbalanced 1/4-inch output allows direct connection to powered speakers or recording interfaces. This versatility makes it easy to integrate the system into existing sound environments without additional adapters or converters.

Performance and reliability

With 123 selectable frequencies and the ability to run up to 12 systems simultaneously in the same band, this system minimizes interference and supports complex multi-user environments. The cardioid microphone capsule resists moisture, maintaining consistent audio quality even during vigorous workouts or performances. Long battery life ensures uninterrupted use throughout extended sessions, reducing downtime and the need for frequent battery changes.

Ideal uses and environments

This headset microphone system is well suited to fitness studios, dance classes, group exercise sessions, and any active presentation where hands-free operation and clear voice transmission are essential. Its wireless range and robust frequency options make it a strong choice for instructors and presenters who need freedom of movement across large spaces without sacrificing audio clarity.

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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