Sennheiser 505900

Overview

The Sennheiser 505900 is a SpeechLine Digital Wireless bodypack transmitter designed to deliver clear and natural speech for presenters, lecturers, and trainers in various environments. It supports up to 15 hours of operation on a single charge with its rechargeable BA 30 lithium-ion battery, ensuring long-lasting performance during extended sessions. This transmitter pairs seamlessly with compatible Sennheiser microphones like the SL Headmic 1 and MKE 1 lavalier, providing freedom of movement and reliable audio quality.

Key features

• Automatic frequency selection and interference management to maintain a stable and clear audio connection without manual adjustments
• Two-way communication with the receiver for real-time status updates, including battery level and signal strength
• LC display on the bodypack shows essential information such as battery status, RF strength, and link name for easy monitoring
• Convenient mute slider allows instant silencing of the microphone when needed, enhancing control during presentations
• AES 256-bit encryption ensures secure transmission, keeping conversations private and protected from eavesdropping
• Lightweight and durable housing designed to withstand daily use while remaining comfortable to wear
• Recharge options include docking in a Sennheiser CHG 2 charger or USB connection for flexible power management

Key specs

• Battery: BA 30 lithium-ion rechargeable
• Battery life: up to 15 hours per charge
• Encryption: AES 256-bit
• Display: LC display showing battery level, RF strength, and link name
• Compatibility: works with SL Headmic 1, MKE 1 lavalier, and other compatible Sennheiser microphones
• Charging: via Sennheiser CHG 2 charger or USB cable

Connectivity and compatibility

This bodypack transmitter is designed to integrate smoothly with Sennheiser’s SpeechLine Digital Wireless system. It supports a range of professional microphones, allowing users to select the best microphone type for their speaking style and environment. The automatic frequency management ensures it operates without interference in crowded RF environments, making it suitable for corporate boardrooms, lecture halls, houses of worship, and event spaces.

Ideal uses and environments

The transmitter is well suited to settings where clear speech reproduction is critical and ease of use is a priority. It fits naturally into professional presentations, academic lectures, training sessions, and public speaking events. Its long battery life and secure transmission make it a strong choice for users who need reliable wireless audio without complicated setup or frequent interruptions.

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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