The One-Way Digi-Wave 400 Personal Communication System provides simple, clear, and secure one-way communication between a speaker and listener. Designed for reliability and ease of use, it ensures professional-grade audio in educational, corporate, and interpretive environments.
Compact and lightweight, it’s the perfect solution for tour guides, teachers, and interpreters who need dependable, interference-free audio transmission in any setting.
$1,080.00
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The Digi-Wave 400 Personal Communication System delivers efficient, one-way audio transmission from one speaker to one listener. It operates on secure frequency-hopping spread spectrum (FHSS) technology, ensuring clear sound and privacy by minimizing interference from nearby devices.
This portable setup includes a DLT 400 transceiver for the speaker and a DLR 400 RCH rechargeable receiver for the listener. A MIC 454 lapel microphone and EAR 041 earphone provide comfort and audio precision, while charger adapters and silicone protective skins keep devices ready for everyday use.
Packaged in a CCS 043 system carrying case, the Digi-Wave 400 is easy to transport and expand. Additional transmitters or receivers can be added for larger group communication, making it suitable for guided tours, assistive listening, and formal presentations.
The 2-Person Digi-Wave 400 Personal Communication System is an all-in-one solution for one-way communication. It combines digital clarity, durability, and portability for effective communication across professional settings.
Included in this system:
Performance highlights
With its user-friendly setup and reliable signal performance, the Digi-Wave 400 Personal Communication System ensures professional, interference-free communication for any audience or setting.

| DLR 400 RCH Receiver | |
| Dimensions | 4.22″W x 2.60″H x 0.50″D (107.3 mm x 66 mm x 12.6 mm) |
| Weight | 3.3 oz (94 g) including battery |
| Color | Black |
| Battery Type | Lithium Polymer with smart charge; 1800 mAh |
| Battery Life | Up to 32 hrs per charge @ 1ch Rx |
| Power Save | Auto Sleep Mode after 5 minutes of no RF signal |
| Charge Time | ~5 hours |
| System Voltage | OLED 14 VDC; RF 5 VDC; Logic 3.3 VDC |
| Operating Frequencies | 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS |
| Audio Frequency Response (-3 dB) | Intercom Mode: 100 – 7,200 Hz Other Modes: 100 – 11,500 Hz |
| SNR | 73 dB (A-weighted) |
| THD | 0.1% (Default Volume, 1 kHz) |
| Headphone Output | 3.5 mm TRRS jack; 25 mW @ 32 Ω |
| Line Audio Output | USB-C, adjustable level |
| Range | Up to 900 ft (274 m), depending on environment |
| Modulation | FSK |
| RF Sensitivity | -92 dBm |
| Security | 87-bit encryption (300 Series compatible), 87 + 128-bit encryption, Encryption PIN, Settings Lock |
| Indicators | OLED display |
| LEDs | Bi-color LED (green/red) at top |
| Charging Connectors | USB-C; two contacts for CHG 412 |
| Compatible Units | DLT 400, DLT 300 (some limitations) |
| Operating Temperature | 14º – 113ºF (-10º – 45ºC) |
| Approvals | FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki |
| Warranty | 2-year warranty; 1 year on internal battery |
| DLT 400 Transceiver | |
| Dimensions | 4.22″W x 2.60″H x 0.50″D (107.3 mm x 66 mm x 12.6 mm) |
| Weight | 3.3 oz (94 g) including battery |
| Color | Black / Silver (Front / Back) |
| Case Material | Black ABS plastic |
| Battery Type | Lithium Polymer with smart charge; 1800 mAh |
| Battery Life | Up to 16 hrs talk time (1ch Tx / 1ch Rx) |
| Power Save | Auto Sleep Mode after 5 minutes (can be disabled in Advanced Settings) |
| Charge Time | ~5 hours |
| System Voltages | OLED 14 VDC; RF 5 VDC; Logic 3.3 VDC |
| Operating Frequencies | 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS |
| Audio Frequency Response (-3 dB) | Interpretation / Tour / Hearing Assist (≤4 mics): 100 – 11,500 Hz Other Modes: 100 – 7,200 Hz |
| SNR | 73 dB (A-weighted) |
| THD | 0.1% (Default Volume, 1 kHz) |
| Microphone Input | Internal mic (disabled when MIC jack engaged) and 3.5 mm phone jack; Electret mic bias, adjustable gain (63 dB range) |
| Line Input | USB-C, adjustable level |
| Headphone Output | 3.5 mm TRRS jack; 25 mW @ 32 Ω |
| Audio Output | Headphone: Max SSPL 90 – 111.8 dB (EAR 013), 116.8 dB (EAR 041) Line: USB-C, adjustable level |
| Range | Up to 900 ft (274 m) |
| Modulation | FSK |
| RF Output | 19 dBm Max |
| Security | 87-bit encryption (300 Series compatible), 87 + 128-bit encryption, Encryption PIN, Settings Lock |
| Side Tone | -6 dB; Off / Low / High |
| Indicators | OLED display |
| LEDs | Red LED around Talk button; bi-color top LED |
| Charging Connectors | USB-C; two contacts for CHG 412 |
| Compatible Receivers | DLR 400 RCH, DLR 400 ALK, DLT 300, DLR 360 (limitations apply) |
| Operating Temperature | 14º – 113ºF (-10º – 45ºC) |
| Approvals | FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki |
| Warranty | 2-year warranty; 1 year on internal battery |
| EAR 041 In-Ear Earphone | |
| Style | Single, in-ear, isolation earphone |
| Plug | 3.5 mm mono |
| Cord Length | 39″ |
| Driver Size | 10 mm |
| Nominal Impedance | 16 Ω |
| Frequency Response | 20 – 20 kHz |
| Weight | 6 g |
| Max Power Input | 5 mW |
| Sensitivity | 104 dB @ 1 kHz |
| Replacement Silicone Tip | EAR 043 (one pair) |
| DW ACC PAC (Power Adapter Kit) | |
| Weight | 0.25 lbs |
| Input Power | 100–240 VAC, 50/60 Hz, 0.2 A |
| Output Power | +5 VDC, 1.0 A |
| Included Adapters | US, UK, Euro, Australia |
| Approvals | UL, CE, IC |
| Warranty | 90 days |
| Overall Warranty | |
| 2 Years | |
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This system is designed for situations where one person needs to speak clearly to another or to a group. It’s ideal for classrooms, tours, and interpretation settings requiring uninterrupted, high-quality sound.
The one-way version allows a single speaker to transmit to one or more listeners, while the two-way model supports back-and-forth conversation. This makes it perfect for guided or instructional communication.
It uses frequency-hopping spread spectrum (FHSS) technology with dual encryption (128 + 87-bit) to prevent signal interference and protect sensitive conversations, ensuring complete privacy in professional environments.
Yes. You can easily add more receivers (DLR 400 ALK or RCH) or transmitters (DLT 400) to accommodate larger audiences without compromising sound quality or signal strength.
Both the transmitter and receiver deliver up to 16 hours of battery life per charge, ensuring uninterrupted communication during long sessions or multi-day events.
Yes. The CCS 043 carrying case makes it simple to move between locations, while quick setup allows users to begin communicating within minutes of powering on the devices.
The Digi-Wave One-Way kit is widely used by educators, interpreters, tour guides, and professionals in legal or business settings who need consistent, one-way communication with no interference or audio dropouts.
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