Rechargeable Digi-Wave 400 Series Interpret Sys for four languages plus

The Williams AV 50-Person Portable Digi-Wave 400 Series Rechargeable Interpretation System is configured for five presenters and 50 listeners. Built around DLT 400 transceivers and DLR 400 RCH receivers, it provides secure wireless listening for a four-languages-plus interpretation setup. The system operates in the 2.4 GHz ISM band using frequency-hopping spread spectrum across 2402 to 2476 MHz. Its rechargeable design supports portable deployment without requiring a wired audio distribution system.

Ideal Use Cases

This model is intended for multilingual sessions that require several presenters and a larger listener group. The five-presenter, 50-listener configuration suits portable interpretation work where equipment must be charged, transported, and redeployed. Its published wireless range reaches up to 900 ft (274 m), depending on environmental conditions, providing flexibility when participants are distributed across a broad operating area. The specified operating temperature range is 14 to 113 degrees F (-10 to 45 degrees C).

Why Choose This Model

The Digi-Wave 400 platform combines rechargeable operation with multiple security controls. Listed security features include 87-bit encryption for 300 Series compatibility, 87+128-bit encryption, an encryption PIN, and a settings lock. The lithium-polymer battery specification lists 1800 mAh capacity with smart charging built into the transceiver. Battery life reaches up to 32 hours per charge during one-channel reception, while the approximate charging time is five hours. Auto Sleep Mode activates after five minutes without an RF signal from compatible devices.

Installation and Integration

As a portable system, the Digi-Wave configuration centers on equipment preparation and charging rather than permanent installation. Compatible charging options include USB-C and two charging contacts for use with the CHG 412. The listed charging enclosure accommodates 12 units and supplies 5 VDC at 0.5 A per bay across 12 charging bays. Charge status is displayed on the connected DLT or DLR device. Power is provided through a universal 5 VDC, 6 A center-positive adapter, with a listed TFP 066 input range of 90 to 240 VAC and 1.5 A maximum. Audio connections include a 3.5 mm TRRS headphone jack and adjustable-level USB-C line audio.

Performance Highlights

The system provides an audio frequency response of 100 to 7,200 Hz in Intercom Mode and 100 to 11,500 Hz in other modes. Published performance figures include a 73 dB A-weighted signal-to-noise ratio and 0.1% total harmonic distortion at default volume and 1 kHz. The headphone connection delivers 25 mW into 32 ohms. A built-in microphone is available and is disabled when the external microphone jack is engaged. The 3.5 mm microphone input supplies electret bias and offers adjustable gain across a 63 dB range. RF output is rated at 19 dBm maximum, and modulation is FSK. Side tone is set 6 dB below volume, with Off, Low, and High variation settings.

What Makes It Different

This configuration brings together support for five presenters, 50 listeners, rechargeable operation, long receiver battery life, and layered encryption. Receiver compatibility includes the DLR 400 RCH and DLR 400 ALK, along with the DLT 300 and DLR 360 with some limitations. The listed enclosure is black ABS plastic with a metal base, measures 26.2 inches long by 19.7 inches wide by 13.2 inches high, and weighs 23 lbs. Its front and back color specification is black and silver. The CCS 054 replaces the CCS 049. Listed approvals include CE, FCC, WEEE, RoHS, and CB.

Final Assessment

The DWS INT 5 400 RCH is a focused portable interpretation package for applications requiring five presenters and as many as 50 listeners. Its 2.4 GHz FHSS operation, up to 900 ft range, rechargeable power, five-hour approximate charging cycle, and encryption controls address the central requirements of secure multilingual listening. Compatibility with current DLR 400 receivers and selected earlier Digi-Wave devices provides additional integration options, subject to the stated limitations.