Digi-Wave Personal Communication System

The Williams AV Digi-Wave Personal Communication System is designed for secure, seamless one-way communication from one person to another. Operating in the 2.4 GHz ISM band, it combines frequency-hopping spread spectrum technology, encryption controls, rechargeable power, and portable components for communication in environments where intelligibility, privacy, and straightforward operation matter.

Ideal Use Cases

This system is suited to confidential boardroom discussions, legal and courtroom proceedings, factory tours, and business meetings. Its one-way configuration provides a focused communication path between a presenter or speaker and a listener. A specified operating range of up to 900 feet (274 meters), depending on environmental conditions, supports applications across meeting spaces, facilities, and other locations where the participants may need freedom of movement.

For privacy-sensitive settings, the Digi-Wave platform uses a frequency-hopping algorithm designed to prevent interference and supports optional PIN-code access to help prevent unauthorized listening. Security specifications include 87-bit encryption for 300 Series compatibility, 87+128-bit encryption, an encryption PIN, and a settings lock.

Why Choose This Model

The rechargeable design supports up to 32 hours of operation per charge in one-channel receive mode. A lithium-polymer battery with 1800 mAh capacity and smart charging is built into the transceiver, while Auto Sleep Mode activates after five minutes without an RF signal from compatible devices. Approximate charging time is five hours.

Portability is central to the system. The listed device dimensions are 4.22 inches wide by 2.60 inches high by 0.50 inches deep, and weight is 3.3 ounces including the battery. Portable transmitters, receivers, and accessories make the system easier to transport, store, set up, and operate in changing locations.

Installation and Integration

Charging connectivity includes USB-C and two contacts for use with the CHG 412. The power specifications cover 100–240 VAC, 50/60 Hz input at 0.2 A and +5 VDC, 1.0 A output, with US, UK, Euro, and Australia adapters included. The listed operating temperature range is 14 to 113 degrees Fahrenheit (-10 to 45 degrees Celsius).

Expansion is available by adding DLT 400 transceivers, rechargeable DLR 400 RCH receivers, or alkaline DLR 400 ALK receivers. Compatibility also extends to the DLT 300 and DLR 360 with stated limitations. This allows the system to accommodate additional participants while retaining the Digi-Wave communication platform.

Performance Highlights

The system operates from 2402 to 2476 MHz using FHSS and FSK modulation. Maximum RF output is specified at 19 dBm, with a listed RF sensitivity of 92 dBm. Audio performance specifications include a 73 dB A-weighted signal-to-noise ratio and 0.1 percent total harmonic distortion at default volume and 1 kHz. Frequency response is 100 to 7,200 Hz in Intercom Mode and 100 to 11,500 Hz in other modes.

A 3.5 mm TRRS headphone jack provides 25 mW output at 32 ohms, while USB-C supplies an adjustable line-audio output. The transmitter specifications include an internal microphone that is disabled when the microphone jack is engaged, plus a 3.5 mm electret microphone input with adjustable gain across a 63 dB range. Side tone is set 6 dB below volume, with Off, Low, and High tone settings available.

What Makes It Different

Digi-Wave combines portable operation with multiple layers of communication control. Its OLED indicator, illuminated Talk-button ring, and bi-color top LED provide visible operating feedback. USB-C supports adjustable line input and output in addition to charging connectivity, while the settings lock and encryption PIN help preserve the intended configuration.

The black ABS enclosure has a black front and silver back. Listed approvals include FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, and Giteki. The system also supports flexible receiver selection, including rechargeable and alkaline Digi-Wave models, making it adaptable to different operating and expansion requirements.

Final Assessment

The DWS PCS 3 400 RCH brings together one-way communication, rechargeable portability, frequency-hopping operation, encryption features, and a range of up to 900 feet. Its long per-charge runtime, compact dimensions, USB-C connectivity, regional power adapters, and support for additional Digi-Wave transceivers and receivers make it a capable choice for secure communication in professional, legal, meeting, and tour environments.