20-Person Digi-Wave Tour Guide System
Last updated Nov 1, 2026 · 2 entries in Page history
A portable, wireless tour system. A guide talks through one DLT 400 transceiver to as many as 20 guests on DLR 400 ALK receivers, and a carrying case, headset and earphones come with it.
As the source prints itSystem Includes(1) DLT 400 transceiver
(20) DLR 400 ALK receivers
(1) MIC 144 headset microphone
(20) EAR 022 surround earphones
(20) BAT 010-2 AAA alkaline batteries
(1) DW ACC PAC4
(1) CCS 056 26 system carry case
(1) CCS 061 GR grey silicone skinPress to see it in the sheet ↓
As the source prints itDLT 400: RangeUp to 900 ft (274 m) (depending upon environmental conditions)Press to see it in the sheet ↓
As the source prints itDLR 400 ALK: Battery LifeAlkaline Disposable (BAT 010-2): Up to 30 hrsPress to see it in the sheet ↓
As the source prints itDLT 400: Battery lifeUp to 16 hrs talk time per charge@ 1ch Tx and 1ch RxPress to see it in the sheet ↓
- Part number or model
- DWS TGS 20 400 ALK
- Catalog number
- Not assigned yet
- Searched on PriceQ as
- “Williams DWS TGS 20 400 ALK”
Specifications
70 fields, as the sources state them
Description
- System Includes
- (1) DLT 400 transceiver (20) DLR 400 ALK receivers (1) MIC 144 headset microphone (20) EAR 022 surround earphones (20) BAT 010-2 AAA alkaline batteries (1) DW ACC PAC4 (1) CCS 056 26 system carry case (1) CCS 061 GR grey silicone skin1
CCS 056 26
- Interior Dimensions
- 13.0” W x 18.0” L x 6.7”H (33 cm W x 46 cm L x 17 cm H)1
- Exterior Dimensions
- 15.7” W x 19.7” L x 7.2” H (40 cm W x 50 cm L x 18 cm H)1
- Lid Inner Depth
- 1.5” (4 cm)1
- Bottom Inner Depth
- 5.2” (13 cm)1
- Approx. weight (empty)
- 6.6 lbs (3 kg)1
- Material
- Copolymer1
- Minimum Temperature
- -40ºF (-40ºC)1
- Maximum Temperature
- 160ºF (71.1ºC)1
DLR 400 ALK
- DLR 400 ALK: Dimensions
- 2.36" W x 3.54" H x 0.63" D (60 mm x 90 mm x 16 mm)1
- DLR 400 ALK: Weight
- 1.7 oz. (47 g) without batteries.1
- Frequency Band
- 2.4 GHz (ISM band)1
- DLR 400 ALK: Modulation
- FSK1
- DLR 400 ALK: Case Material
- Black ABS Plastic1
- DLR 400 ALK: Battery Type
- 2 x AAA Alkaline Batteries1
- DLR 400 ALK: Battery Life
- Alkaline Disposable (BAT 010-2): Up to 30 hrs1
- DLR 400 ALK: Power Save
- Auto Sleep Mode after 5 minutes of no RF signal from compatible devices1
- DLR 400 ALK: Audio Frequency Response: (-3dB level)
- Intercom Mode: 100 – 7,300 Hz Interpretation and other modes: 100-11,200 Hz1
- DLR 400 ALK: SNR
- 74 dB (A-weighted)1
- DLR 400 ALK: THD
- 0.1% (typical)1
- Antenna
- Internal1
- DLR 400 ALK: Range
- Up to 900 ft (274 m) (depending upon environmental conditions)1
- Headphone Audio Output
- 3.5 mm TRRS jack with mono output for headphones, earphones, or neckloop 27 mW maximum @32 ohms1
- Display
- LCD shows status: Battery Level, RSSI, Group/Channel #1
- Temp. Range
- 14° – 113°F (-10° to 45°C)1
- Compatible Units
- DLT 400, DLT 3001
- DLR 400 ALK: Approvals
- FCC, Industry Canada, RoHS 3, CE, WEEE, RCM, ANATEL, KC, Giteki1
- DLR 400 ALK: Warranty
- 2-year warranty against component failure and manufacturing defects. See Full Warranty on the website for details1
DLT 400
- DLT 400: Dimensions
- 4.22"W x 2.60"H x 0.50"D (107.3 mm x 66 mm x 12.6 mm)1
- DLT 400: Weight
- 3.3 oz (94 g) including battery1
- Color
- Black/Silver (Front/Back)1
- DLT 400: Case Material
- Black ABS plastic1
- DLT 400: Battery type
- Lithium Polymer with smart charge built into transceiver; 1800 mAH1
- DLT 400: Battery life
- Up to 16 hrs talk time per charge@ 1ch Tx and 1ch Rx1
- DLT 400: Power Save
- Auto Sleep Mode after 5 minutes if no RF signal from compatible devices (Power can be turned off in Advanced Settings if desired)1
- Charge time
- 5 hrs. approx.1
- System Voltages
- OLED 14VDC; RF 5VDC; Logic 3.3 VDC1
- Operating frequencies
- 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS1
- DLT 400: Audio Frequency response (-3dB Level)
- Interpretation, Tour, Hearing Asst (≤4 mics): 100 – 11,500 Hz Other Modes: 100 – 7,200 Hz1
- DLT 400: SNR
- 73 dB (A-weighted, default Rx volume with mic input )1
- DLT 400: THD
- 0.1 % (Default Volume, 1kHz)1
- 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.1
- Line Input
- USB-C, Adjustable level1
- Headphone Output
- 3.5 mm TRRS headphone jack; 25 mW, R 32 ohms1
- Audio Output
- Headphone: Max SSPL 90 111.8dB (EAR 013), 116.8dB (EAR 041) Line: USB-C, Adjustable level1
- DLT 400: Range
- Up to 900 ft (274 m) (depending upon environmental conditions)1
- DLT 400: Modulation
- FSK1
- RF Output
- 19 dBm Max1
- Security
- 87-bit encryption (300 Series Compatible), 87+128 bit Encryption, Encryption PIN, Lock for settings1
- Side tone
- -6 dB below volume, tone variation (Off, Low and High settings available)1
- Indicators
- OLED1
- LEDs
- Red LED around Talk button when enabled; Bi-color, changing green and red LED at top1
- Charging Connectors
- USB-C; Two contacts for use with CHG 4121
- Compatible Receiver
- DLR 400 RCH, DLR 400 ALK, DLT 300 with some limitations and DLR 360 with some limitations1
- Operating Temperature Range
- 14º to 113ºF (-10º to 45ºC)1
- DLT 400: Approvals
- FCC, Industry Canada, CE, RoHS 3, WEEE, RCM, ANATEL, KC, Giteki1
- DLT 400: Warranty
- 2-years warranty against component failure and manufacturing defects. 1 year on the internal battery. See Full Warranty on the website for details.1
EAR 022
Warranty
- Warranty
- 2 Years1
Spec sheet
- Key Features
- Portable digital transceiver with built-in mic Completely portable - no base station or rack-mounted components required Crystal-clear digital sound quality Use as a two-way wireless intercom or in one-way mode Accommodates six simultaneous talkers and an unlimited number of listeners Built for security. Optional 128+87 bit encryption, secure key code, lock for settings2
- Applications
- Intercom Language interpretation Tours Presentations Hearing Assistance2
- Markets
- Government - courtrooms Corporate - training, presentation, tours Broadcast Healthcare - medical centers Education - classrooms & lecture halls2
Sources: williamsav.com, Product page, read Nov 1, 2026 UTC; williamsav.com, Digi-Wave 400 Series spec sheet SEL-DL400-C725, page 1, read Nov 1, 2026 UTC.
Size and weight
Inches and pounds, millimetres and kilograms
The product
| What | Inches and pounds | Millimetres and kilograms |
|---|---|---|
| DimensionsDLT 400 transceiver | W4.22 | W107.3 |
| WeightDLT 400 transceiver, including battery | 3.3 oz0.206 lbconverted | 94 g0.094 kgconverted |
| DimensionsDLR 400 ALK receiver | W2.36 | W60 |
| WeightDLR 400 ALK receiver, without batteries | 1.7 oz0.106 lbconverted | 47 g0.047 kgconverted |
| WeightEAR 022 earphone | 0.033 lbconverted | 15 g0.015 kgconverted |
| DimensionsCCS 056 26 carry case, exterior | W15.7 | W40 |
| DimensionsCCS 056 26 carry case, interior | W13.0 | W33 |
| DimensionsCCS 056 26 carry case, lid inner depth | D1.5 in | D4 cmD40 mmconverted |
| DimensionsCCS 056 26 carry case, bottom inner depth | D5.2 in | D13 cmD130 mmconverted |
| WeightCCS 056 26 carry case, empty | approx.6.6 lb | approx.3 kg |
Figures in black are the maker’s. Figures in grey are converted by the wiki (1 in = 25.4 mm, 1 lb = 0.45359237 kg).
More from Williams AV
6 pages on the wiki
Documents
6 linked, none copied here
References
2 sources, each with the day it was read
- williamsav.com, Product page, read Nov 1, 2026 UTC. Supports 67 specifications, the related products, the documents
- williamsav.com, Digi-Wave 400 Series spec sheet SEL-DL400-C725, page 1, read Nov 1, 2026 UTC. Supports 3 specifications, the documents
Page history
Every read and every change to this page, newest first
- Page created from the maker’s page, among the products buyers searched on PriceQ. Product type proposed. Descriptions written at three lengths from the specifications.Claude Opus (AI agent) · Not reviewed yet
- Read on williamsav.com: Product page; Digi-Wave 400 Series spec sheet SEL-DL400-C725, page 1.Claude Opus (AI agent) · Not reviewed yet
The descriptions are written by the wiki from the specifications above, never copied from the maker.