Product Overview

The Williams AV DLR 400 RCH is a rechargeable wireless receiver for Digi-Wave 400 systems, used as the listen-only endpoint in language interpretation, guided tour, assistive listening, and intercom monitoring deployments. Its internal lithium polymer battery delivers up to 32 hours per charge, and the receiver pairs with any DLT 400 transceiver over an encrypted, license-free 2.4 GHz link. For venues fielding dozens of receivers, drop-in charging via the CHG 412 keeps the fleet ready without battery swaps.

Product Description

The DLR 400 RCH receives digital spread-spectrum (DSS) audio from Digi-Wave DLT 400 transceivers, with frequency hopping across 24022476 MHz to avoid interference from venue Wi-Fi and other 2.4 GHz traffic. Audio is protected by 87-bit plus 128-bit encryption with PIN support, which matters for courtroom interpretation, government briefings, and corporate events where content must stay private. Typical deployments include language interpretation the Digi-Wave platform carries one floor language plus up to 14 interpreted languages guided facility tours, hearing assistance for ADA compliance programs, and listen-only positions on a production intercom. The receiver matches the DLT 400 form factor at 3.3 ounces with an OLED status display, and its 3.5 mm TRRS headphone jack drives headphones, earphones, or a neckloop for hearing aid telecoil users. A USB-C port provides adjustable line-level audio output for feeding recorded archives or overflow sound systems, and doubles as the charging connector alongside contacts for the CHG 412 12-bay drop-in charger. With up to 32 hours of listening per five-hour charge and an auto-sleep mode that conserves power when no RF signal is present, the DLR 400 RCH suits venues that issue receivers daily. It pairs with the DLT 400 transceiver; if your program prefers field-replaceable AA-style batteries, see the DLR 400 ALK alkaline version.

Key Features

• 32-Hour Rechargeable Battery The internal 1800 mAh lithium polymer battery supports multiple event days of listening per five-hour charge.
• Encrypted 2.4 GHz Reception 87-bit plus 128-bit encryption with PIN protection keeps interpreted and assistive audio confidential.
• License-Free FHSS Link Frequency-hopping spread spectrum avoids interference and requires no FCC license or coordination at any venue.
• Neckloop and Headphone Support The 3.5 mm TRRS output drives headphones, earphones, or telecoil neckloops for assistive listening and ADA compliance programs.
• USB-C Line Output Adjustable line-level audio over USB-C feeds recorders or installed sound systems when needed.
• Fleet-Friendly Charging Charge over USB-C or drop units into the CHG 412 12-bay charger for daily turnaround of large receiver pools.
• 900-Foot Range Reception up to 274 m (site dependent) covers auditoriums, tour routes, and multi-room facilities.
• OLED Status Display Channel, battery, and signal information is visible at a glance for staff distributing units.
• Auto Sleep Power Save The receiver sleeps after five minutes without a compatible RF signal, extending battery life between sessions.

Typical Applications

• House of worship language interpretation and assistive listening
• Government space and courtroom interpretation
• Auditorium and all-hands room hearing assistance
• Training room and multi-purpose room listening
• Conference room and commercial meeting space language support

Technical Specifications

Frequently Asked Questions

Which transmitters work with the DLR 400 RCH?

The receiver pairs with the Digi-Wave DLT 400 transceiver, and with the legacy DLT 300 in 87-bit encryption mode with some limitations. It is a listen-only device, so every system needs at least one DLT 400 as the audio source.

How does the DLR 400 RCH support assistive listening and ADA compliance?

The 3.5 mm TRRS output drives headphones, single or dual earphones, or a telecoil neckloop, allowing venues to offer hearing assistance alongside interpretation from the same receiver pool.

What is the difference between the DLR 400 RCH and the DLR 400 ALK?

The RCH has an internal rechargeable lithium polymer battery (up to 32 hours per charge, USB-C or CHG 412 charging). The ALK runs on two AAA alkaline batteries (up to 30 hours) for programs that prefer field-swappable disposables.

How do venues charge large fleets of receivers?

Each unit charges over USB-C, and the CHG 412 12-bay drop-in charger restores up to twelve units at a time a full charge takes about five hours, making overnight turnaround straightforward for facilities staff.

Does it require any licensing to operate?

No. The receiver operates in the license-free 2.4 GHz ISM band, so venues deploy it without FCC licensing or frequency coordination.

What warranty applies?

Williams AV covers the DLR 400 RCH with a 2-year warranty against component failure and manufacturing defects, with 6 months on the internal battery.