Choosing an electronic shelf label communication technology comes down to four things: the destination country, the building materials, how often prices change, and who owns the software. The specification sheet with the largest numbers is rarely the right answer. The comparison below sets out the options side by side and sets out the regional rules that decide which band is even legal. For what each technology is, see all 13 electronic shelf label communication technologies explained.
Side-by-Side Comparison
No single technology wins on every criterion, which is why the market still runs several in parallel.
| Criterion | Sub-GHz | 2.4GHz | Bluetooth ESLP | Infrared | NFC |
|---|---|---|---|---|---|
| Penetration | Strongest | Medium | Medium | Line of sight only | Contact |
| Labels per gateway | Medium | 20,000+ | High | Medium | No gateway |
| Update speed | Medium | Seconds | Seconds | Seconds | Manual, one by one |
| Interference risk | Low | High (shares Wi-Fi band) | Medium | None (not radio) | None |
| Standardisation | Proprietary | Proprietary | Open standard | Single vendor | Open standard |
| Regional approval effort | High | Low | Low | Low | Low |
| Best fit | Warehouses, metal racking | Supermarket chains | Multi-vendor estates | Large stores avoiding RF | Boutiques, single fixtures |
Source: AiEInkSmart engineering documentation and published vendor specifications, 2026.
Regional Rules That Decide the Band
Sub-GHz spectrum is allocated differently in each region, so the destination country fixes the frequency before any technical preference applies. A quotation for a sub-GHz system means nothing until the market is named.
| Region | Band | Regulation | Power limit | Requirement |
|---|---|---|---|---|
| Europe | 868MHz | ETSI EN 300 220 | 14 dBm | Duty cycle or listen-before-talk |
| North America | 915MHz | FCC Part 15.247 | 30 dBm | Frequency hopping |
| Broadly available | 433MHz | ETSI EN 300 220 range | Region dependent | Check per country |
| Global | 2.4GHz | Harmonised ISM | Region dependent | No band change needed |
Source: ETSI EN 300 220 and FCC Part 15.247. Confirm current limits with a certification body before production.
How to Choose in Four Questions
Match the technology to the building and the market, not to the longest feature list.
Where will the labels be installed? The destination country fixes the sub-GHz band, or points to 2.4GHz to avoid the question entirely.
What is the store made of? Heavy metal racking, cold rooms and thick structural walls favour sub-GHz. Standard supermarket shelving favours 2.4GHz.
How often do prices change? Daily promotions require a gateway system. A handful of changes per season makes NFC viable and removes the gateway budget.
Who owns the software? An integrator running its own platform should insist on documented MQTT or REST access whatever the radio underneath, and should ask for the API manual before ordering rather than after.
Where One Manufacturer Sits
AiEInkSmart manufactures 2.4GHz, 433MHz, Bluetooth and NFC electronic shelf label systems, and does not currently produce 868/915MHz proprietary, Zigbee, infrared optical or passive RFID labels. Naming that boundary is more useful to a buyer than claiming everything, because a supplier who offers every technology usually resells most of them. Compare hardware on the electronic shelf labels and gateway pages, or test a complete system with an ESL demo kit before committing to a rollout.
FAQ
What frequency do electronic shelf labels use?
Most electronic shelf labels use either 2.4GHz or a sub-GHz band of 433MHz, 868MHz or 915MHz. NFC labels use 13.56MHz, passive RFID labels use 860-960MHz, and infrared systems use light near 880nm rather than radio.
Can the same label work in Europe and the United States?
A 2.4GHz label works in both because the band is globally harmonised. A sub-GHz label cannot: Europe uses 868MHz under ETSI rules and North America uses 915MHz under FCC rules, and each requires separate certification.
What does "Sub-GHz ISM" mean on a specification sheet?
Sub-GHz ISM means any licence-free industrial, scientific and medical band below 1GHz, which includes 433MHz, 868MHz and 915MHz. A request for sub-GHz is therefore satisfied by a 433MHz product unless the buyer names a specific band.
Do electronic shelf labels interfere with store Wi-Fi?
A 2.4GHz label system shares the band with Wi-Fi but runs its own protocol and channels, and normal deployments do not consume Wi-Fi bandwidth. Where a store runs dense Wi-Fi, moving the labels to 433MHz removes the overlap completely.
Is sub-GHz better than 2.4GHz?
Neither is better in general. Sub-GHz wins on penetration and range, 2.4GHz wins on speed, gateway capacity and shipping simplicity across markets. Building materials and destination market decide the answer.
Does the communication technology affect battery life?
Yes. Transmit power, how often a label wakes to listen, and how many retries a weak link forces all consume energy, so the same display lasts markedly longer on a well-tuned network than on a congested one.
Is Bluetooth on a label the same as the Bluetooth ESL standard?
Not necessarily. Many products use Bluetooth LE in a private way predating the standard. Ask whether the product implements the Bluetooth Electronic Shelf Label Profile from Core Specification 5.4, because only that guarantees standard behaviour.
Which technology has the largest installed base?
Proprietary radio, split between 2.4GHz and the sub-GHz bands, carries most electronic shelf labels installed today. Standards-based Bluetooth is the fastest-moving newcomer.
About the author: Panda Wang is co-founder of PanPanTech (AiEInkSmart), an electronic shelf label manufacturer operating an ISO 9001 plant in Guangzhou and serving 6,000+ stores in 30+ countries. Published August 2026.
