Portable Display RF Receiver (72 MHz)
Last updated Nov 1, 2026 · 2 entries in Page history
The LR-400-072 is a portable RF receiver from Listen Technologies for the 72.025 - 75.950 MHz band. It receives 17 wide band or 40 narrow band channels, has an LCD, and runs on two AA batteries.
As the source prints itNumber of Channels17 wide band, 40 narrow bandPress to see it in the sheet ↓
As the source prints itFrequency Range72.025 - 75.950 MHzPress to see it in the sheet ↓
As the source prints itBattery Life30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)Press to see it in the sheet ↓
As the source prints itWeight3.9 oz (111 g)Press to see it in the sheet ↓
- Part number or model
- LR-400-072
- Catalog number
- Not assigned yet
- Searched on PriceQ as
- “Listen LR-400-072”
No confirmed photo of this model
Specifications
35 fields, as the source states them
Overview
- Item
- LR-400-072b
Configurations
- Configurations
- LR-400-072 Portable Display RF Receiver (72 MHz) LR-400-216 Portable Display RF Receiver (216 MHz)
Includes
- Includes
- One (1) LR-400 Portable Display RF Receiver One (1) Quick reference card
Audio
- Frequency Response
- 50 Hz - 15 kHz (±3 dB)
- Signal-to-Noise Ratio
- SQ enabled 80 dB, SQ disabled 60 dB
- Audio Output Jacks
- 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm
- Distortion
- < 2% total harmonic distortion (THD) at 80% deviation
Controls
- User Controls
- Channel up/down, SEEK, volume, Alkaline/NiMH batteries, SQ enable/disable
- Programming
- Channel lock, squelch
Indicators
- LCD
- Channel designation, battery level, battery charging, RF signal strength and channel lock
- LEDs
- Red, illuminated when unit is on, flashes when batteries are low or to indicate charging, flashes when locked and SEEK is pushed
RF
- Frequency Range
- 72.025 - 75.950 MHz
- Number of Channels
- 17 wide band, 40 narrow band
- Sensitivity
- .6uV typical, 1 uV maximum for 12 dB sinad
- Frequency Accuracy
- ± .005% stability 32 to 122 ºF (0 to 50 ºC)
- Squelch
- Programmable in 20 steps, automatic on loss of RF signal
- Antenna Type
- Uses earphone cable
Power
- Power Supply
- I/P 120 VAC; O/P 7.5 VDC 250 mA, drop in contact points for use with charging cases, power supply not included (LA-208)
- Power Supply Connector
- 0.09 in. (2.3 mm) OD by 0.7 mm ID, barrel type connector 7.5 VDC, center positive < 250 mA, drop in contact points for use with Listen charging cases
- Battery Type
- Two (2) AA batteries, alkaline or NiMH
- Battery Life
- 30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
- Battery Charging Time
- Fully automatic, 13 hours
- Compliance
- RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB
Physical
- Width
- 2.75 in. (7.0 cm)
- Height
- 4.25 in. (10.8 cm)
- Length
- 1.50 in. (3.8 cm)
- Unit Weight with Batteries
- 5.8 oz (164 g)
- Shipping Weight
- 1.0 lbs. (0.5 kg)
- Weight
- 3.9 oz (111 g)
- Door
- Manually lockable, SEEK/channel select behind the door
Environmental
- Temperature - Operation
- 14 to 104 ºF (-10 to 40 ºC)
- Temperature - Storage
- -4 to 122 °F (-20 to 50 °C)
- Relative Humidity
- 0 to 95% relative humidity, non-condensing
Compliance
- Safety
- RoHS
- RF
- FCC Part 15, Part 90, Industry Canada
Source: listentech.com, Portable Display RF Receiver B-Stock page, read Nov 1, 2026 UTC.
Size and weight
Inches and pounds, millimetres and kilograms
The product
| What | Inches and pounds | Millimetres and kilograms |
|---|---|---|
| Dimensions | W2.75 | W7.0 |
| Weight | 3.9 oz0.244 lbconverted | 111 g0.111 kgconverted |
| WeightWith batteries | 5.8 oz0.363 lbconverted | 164 g0.164 kgconverted |
The packaging
| What | Inches and pounds | Millimetres and kilograms |
|---|---|---|
| WeightShipping weight | 1.0 lb | 0.5 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).
Compare with
11 of the same family on the wiki
Listen Technologies · Assistive listening componentLA-423-01Side by side with LR-400-072 →
Listen Technologies · Assistive listening componentLA-453Side by side with LR-400-072 →
Listen Technologies · Assistive listening componentLA-481-01Side by side with LR-400-072 →
Listen Technologies · Assistive listening componentLR-3200-072Side by side with LR-400-072 →
Listen Technologies · Assistive listening componentLT-82-01Side by side with LR-400-072 →
Williams AV · Assistive listening componentEAR 013Side by side with LR-400-072 →
Williams AV · Assistive listening componentPPA R37 HDSide by side with LR-400-072 →
Williams AV · Assistive listening componentPPA R37NSide by side with LR-400-072 →
More from Listen Technologies
9 pages on the wiki
- Listen TechnologiesLA-423-01
- Listen TechnologiesLA-453
- Listen TechnologiesLA-481-01
- Listen TechnologiesLR-3200-072
Documents
1 linked, none copied here
References
2 sources, each with the day it was read
- listentech.com, Portable Display RF Receiver B-Stock page, read Nov 1, 2026 UTC. Supports 35 specifications, the related products
- listentech.com, ListenRF Support page, Technical Documentation, CAD Files, read Nov 1, 2026 UTC. Supports 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 listentech.com: Portable Display RF Receiver B-Stock page; ListenRF Support page, Technical Documentation, CAD Files.Claude Opus (AI agent) · Not reviewed yet
The descriptions are written by the wiki from the specifications above, never copied from the maker.
Live prices · PriceQ
What sellers ask for the Listen Technologies LR-400-072 today.
The wiki holds what the maker publishes. PriceQ looks up the sellers. The button opens it with this product already filled in.