Williams AV DWS INT 2 400 ALK – Interpretation System for 1 Presenter, 10 Listeners is backordered and will ship as soon as it is back in stock.
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Product Overview
The Williams AV DWS INT 2 400 ALK is a compact simultaneous interpretation system for one presenter or interpreter and ten listeners, built on the Digi-Wave 400 digital wireless platform. It is an entry point into professional language interpretation equipment for small courtrooms, huddle-room training, clinic consultations, and house-of-worship classes — delivering encrypted 2.4 GHz audio with no base station, no AC-powered transmitter, and no FCC licensing.
Product Description
This single-interpreter package centers on one DLT 400 digital transceiver with a MIC 144 headset microphone. Ten DLR 400 ALK receivers with EAR 022 surround earphones serve the listening group, each powered by two AAA alkaline batteries (ten BAT 010-2 cells included) for up to 30 hours of runtime. The transceiver itself is rechargeable with an internal lithium-polymer battery rated for up to 16 hours of talk time, so a full day of interpretation runs on a single overnight charge.

Digi-Wave 400 transmits frequency-hopping digital spread-spectrum audio that resists interference, reduces background noise, and compensates for room acoustics and listener distance. The signal passes through glass and curtain walls, supporting interpreter positions in adjacent rooms or behind viewing-room glass — a common requirement in courts and medical facilities. Optional 87+128-bit encryption with a secure PIN protects confidential conversations.

Because the platform is modular, this starter kit grows with demand: add receivers for larger audiences (listener count is unlimited) or additional DLT 400 transceivers for more languages, up to 14 translated channels plus floor. The system also operates as a two-way wireless intercom or one-way tour system. Compare larger Digi-Wave packages such as the DWS INT 3 400 two-presenter system, or view all interpretation and assistive listening gear in the Williams AV collection at Creation Networks.
System Includes
- (1) DLT 400 transceiver
- (10) DLR 400 ALK receivers
- (1) MIC 144 headset microphone
- (10) EAR 022 surround earphones
- (10) BAT 010-2 AAA alkaline batteries
- (1) CCS 061 GR grey silicone skin
- (1) CCS 0056 DW 11 system carry case
Key Features
- Right-Sized Starter System — One interpreter channel and ten receivers cover small-group interpretation without paying for unused capacity.
- Expandable Platform — Add unlimited receivers and up to 14 language channels later; every component remains compatible across the Digi-Wave 400 family.
- Contact-Free Wireless Communication — The system provides clear audio between separated parties, transmitting through glass, curtain walls, and viewing rooms.
- No AC Infrastructure — With no base station and battery-powered components throughout, the system works in any room or off-site location.
- Encrypted and Secure — 2.4 GHz frequency hopping with optional 87+128-bit encryption keeps legal, medical, and HR conversations private.
- Long Battery Life — Receivers run up to 30 hours on AAA alkaline cells and the transceiver delivers up to 16 hours of talk time per charge.
- Lightweight Listener Units — Each 1.7 oz DLR 400 ALK with LCD status display is easy to distribute, wear, and collect.
- Cost-Effective Alternative to Two-Way Radios — Digital full-duplex audio at higher quality than typical radio systems, in interpretation, intercom, or tour modes.
Typical Applications
- Huddle room
- Conference room
- Government space
- House of worship
- Training room
- Multi-purpose room
Technical Specifications
| DLT 400 Transceiver | |
|---|---|
| Dimensions / Weight | 4.22" W x 2.60" H x 0.50" D (107.3 x 66 x 12.6 mm); 3.3 oz (94 g) |
| Battery | Lithium polymer 1800 mAh; up to 16 hrs talk time; ~5 hr charge |
| RF | 2.4 GHz ISM band; 2402–2476 MHz FHSS; 19 dBm typical output |
| Audio | 100–11,500 Hz (interpretation modes); SNR 73 dB; THD 0.1% |
| Inputs | Internal mic, 3.5 mm mic jack with electret bias (63 dB gain range), USB-C line input |
| Security | 87-bit / 87+128-bit encryption, encryption PIN, settings lock |
| DLR 400 ALK Receiver | |
| Dimensions / Weight | 2.36" W x 3.54" H x 0.63" D (60 x 90 x 16 mm); 1.7 oz (47 g) without batteries |
| Power | 2 x AAA alkaline; up to 30 hrs; auto sleep after 5 min of no RF |
| Audio | Interpretation modes: 100–11,200 Hz; SNR 74 dB; THD 0.1% typical |
| Output | 3.5 mm TRRS mono, 27 mW @ 32 Ω; headphones, earphones, or neckloop |
| Display | LCD: battery level, RSSI, group/channel |
| System | |
| Range | Up to 900 ft (274 m), environment dependent |
| Earphone (EAR 022) | Around-ear, 23 mm driver, 32 Ω, 20 Hz–20 kHz |
| Operating Temperature | 14° to 113°F (-10° to 45°C) |
| Approvals | FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki |
| Warranty | 2 years |
Frequently Asked Questions
Who is this system sized for?
One interpreter or presenter and up to ten listeners — typical for small court hearings, parent-teacher conferences, clinic consultations, factory tours, and worship classes. The Digi-Wave 400 platform lets you add receivers or language channels later without replacing anything.
Does the interpreter have to be in the same room as the audience?
No. The 2.4 GHz signal transmits through glass and interior walls with up to 900 feet of range, so the interpreter can work from an adjacent room, booth, or viewing area.
How is the transceiver charged if no charger is listed?
The DLT 400 charges over its USB-C port (or in an optional CHG 412 drop-in charger). Receivers use standard AAA alkaline batteries, so no charging dock is required for the listener units.
Can the system handle confidential discussions?
Yes. Optional 87+128-bit encryption with an encryption PIN and settings lock secures the wireless link for legal, medical, and personnel conversations.
Is this compatible with larger Digi-Wave 400 systems we may buy later?
Fully. All DLT 400 transceivers and DLR 400 receivers share the same group/channel structure, so this starter kit folds directly into a larger fleet such as the DWS INT 3 or INT 5 packages.
What warranty and support come with it?
Williams AV provides a 2-year warranty against component failure and manufacturing defects. Creation Networks offers commercial AV support before and after the sale.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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