Williams AV DLT 400 Digi-Wave 400 Digital Wireless Listening System Transceiver

The Digi-Wave system is a digital spread-spectrum (DSS), simultaneous two-way wireless listening system. Using it’s frequency-hopping algorithm, it avoids interference and is a very secure method of communication. The Digi-Wave communication system allows users to listen and talk to one another wirelessly in a variety of scenarios.

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

Technical Specifications

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 built into transceiver; 1800 mAH
Battery life
Up to 16 hrs talk time per charge@ 1ch Tx and 1ch Rx
Power Save
Auto Sleep Mode after 5 minutes of no RF signal from compatible devices
Charge time
5 hrs. approx.
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, default Rx volume with mic input )
THD
0.1 % (Default Volume, 1kHz)
Microphone input
Internal microphone (disabled when MIC jack engaged) and 3.5 mm phone jack (sleeve) with electret microphone bias, adjustable gain with 63dB range.
Line Input
USB-C
Headphone Output
3.5 mm TRRS headphone jack; 25 mW, R 32 ohms
Audio Output
Max SSPL 90 111.8dB (EAR 013), 116.8dB (EAR 041)
Range
Up to 900 ft (274 m) (depending upon environmental conditions)
Modulation
FSK
RF Output
19 dBm Typical
Security
87 bit encryption (300 Series Compatiable), 87+128 bit Encryption, Encrpytion PIN, Lock for settings
Side tone
-6 dB below volume, tone variation (Off, Low and High settings available)
Indicators
OLED
LEDs
Red LED around Talk button when enabled; Bi-color, changing green and red LED at top
Charging Connectors
USB-C; Two contacts for use with CHG 412
Compatible Receiver
DLR 400 RCH, DLR 400 ALK, DLT 300 with some limitations and DLR 360 with some limitations
Operating Temperature Range
14 to 113F (-10 to 45C)
Approvals
FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki
Warranty
2 years parts and labor (90 days on accessories); 6 months on internal battery