Digi-Wave 400 Receiver (Rechargeable)


The Digi-Wave™ system is a digital spread-spectrum (DSS) wireless listening system. The receiver uses a frequency-hopping algorithm to avoid interference and provide a secure method of communication. The Digi-Wave 400 receiver allows users to listen to users with a Digi-Wave transceiver wirelessly in a variety of scenarios.

Great for use during training, presentations, and tours, especially in houses of worship, classrooms, and healthcare facilities.

To download firmware updates for your Digi-Wave product, please contact TechBlue.

System Includes

The DLR 400 has an internal rechargeable battery.


A Digi-Wave system consists of at least one transceiver (DLT 400) and various combinations of transceivers and receivers (DLR 400 RCH or DLR 400 ALK). Combinations of one or more DLT’s and DLR’s can be used to facilitate different events, depending on what needs to be spoken and what needs to be heard. Typical scenarios include:

  • Guided Tours – with one or more tour guides (2-way), with audience participation (2-way), or without audience participation (1-way)
  • Language Interpretation – one or more interpreted languages transmitted to audience (1-way)
  • Intercom – with up to six people able to speak simultaneously, and even more listening
  • Hearing Assistance – featuring boosted audio for improved comprehension

The DLR 400 RCH is rechargeable. If alkaline batteries are preferred, see the DLR 400 ALK.


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 built into transceiver; 1800 mAH
Battery life Up to 32 hrs per charge @ 1ch Rx
Power Save Auto Sleep Mode after 5 minutes of no RF signal from compatible devices
Charge time 5 hrs. approx.
System Voltage OLED 14VDC; RF 5VDC; Logic 3.3 VDC
Operating frequencies 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS
Audio Frequency response
(-3dB Level)
Intercom Mode: 100 – 7,200 Hz
Other Modes: 100 – 11,500 Hz
SNR 73 dB (A-weighted)
THD 0.1 % (Default Volume, 1kHz)
Headphone Output 3.5 mm TRRS headphone jack; 25 mW, R32 Ω
Line Audio Output USB-C, Adjustable Level
Range Up to 900 ft (274 m) (depending upon environmental conditions)
Modulation FSK
RF Sensitivity -92 dBm
Security 87-bit encryption (300 Series Compatible), 87+128 bit Encryption, Encryption PIN, Lock for settings
Indicators OLED
LEDs Bi-color, changing green and red LED at top
Charging Connectors USB-C; Two contacts for use with CHG 412
Compatible Units DLT 400, DLT 300 with some limitations
Operating Tempurature Range 14º to 113ºF (-10º to 45ºC)
Approvals FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki
Warranty 2-year warranty against component failure and manufacturing defects; 6 months on internal battery



2 Years

No Firmware Found

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