The Retail Standard-Compact, Smart, Shelf-Ready
Shelf-Edge Optimized
The 4.2-inch form factor is the global retail standard-purpose-built to slot directly into existing shelf rail systems and label holders with zero modification, enabling full-store deployment in hours, not days.
High-Density Coverage
Compact 97.4×88.9 mm footprint allows more tags per shelf run. Deploy across every SKU-from narrow-aisle grocery to tightly packed convenience stores-without sacrificing readability.
Cloud-Managed Pricing
Real-time cloud synchronization keeps online and in-store prices perfectly aligned. Automate batch updates across thousands of tags per hour-eliminating manual errors and pricing discrepancies instantly.
Drop-in design for standard shelf rails, peg hooks, label holders, and magnetic mounts-no tools or shelf modifications required.
Why the 4.2" Is the World's Most Deployed ESL Size
Large enough to display prices, barcodes, and promotions clearly at 400×300 resolution, yet compact enough to fit standard shelf strips used in 90% of retail stores worldwide.
Smaller form factor means lower per-unit cost. Combined with 5+ year battery life and zero paper consumables, most retailers see full ROI in 12–18 months.
At only 94 g, the tag slides into any label holder or mounts magnetically without weighing down shelf edges-staff can install 500+ units in a single shift.
NFC tap interaction, 7-color pick-to-light LED, multi-page display switching, and QR code integration-every feature of larger models packed into a shelf-edge form factor.
Affordable pricing and compact design make it feasible to digitize every shelf tag in your store-not just high-value items-for 100% digital coverage and total price accuracy.
Built for Performance and Durability
Crisp E-Ink Readability
4.2-inch E-ink display with 400×300 pixel resolution and 84.8×63.6 mm active window. Black/White/Red color support ensures prices and promotions are razor-sharp under any store lighting-with a paper-like reading experience from nearly 180°.
Built-In NFC Interaction
Shoppers tap their phone to access product details, nutritional info, online reviews, or exclusive coupons. Staff use NFC-enabled PDAs for instant tag auditing, binding, and price verification on the shelf edge.
Ultra-Low Power, Long Life
Three replaceable CR2450 batteries deliver 5+ years of operation at 3–5 updates per day. E-ink consumes zero power when static-your tags keep displaying even when the battery is depleted, ensuring pricing never goes blank.
Tough Enough for Any Aisle
IPX5/IPX7 dust and water resistance, operates reliably in 0°C–40°C environments. Freezer-grade options available down to -25°C for refrigerated and fresh produce sections.
7-Color Pick-to-Light LED
Integrated LED supports red, green, blue, yellow, cyan, purple, and white with customizable flash patterns. Ideal for order picking, restocking guidance, promotion highlighting, and multi-task differentiation in retail and warehouse settings.
Reliable Wireless Connectivity
2.4 GHz frequency hopping protocol with BLE 5.0 delivers strong interference resistance and 30–50 m range in dense retail environments. Frequency hopping avoids Wi-Fi congestion for 99%+ update success rates-even during peak hours.
Smart Features in a Compact Body
7-Color LED Pick-to-Light
Order Picking & Restocking
Aisle Navigation & Way Finding
Flash Alerts for Promotions
Color-Coded Task Differentiation
NFC Tap Interaction
Add to Cart Instantly
Access Product Specs & Reviews
Claim Personalized Offers
Link to Online Store Pages
Multi-Page Display
Price, Promo & Inventory Pages
Ingredients & Nutrition Facts
Origin & Certification Info
Switch via Button or Cloud Command
QR Code Integration
Drive Traffic to Online Store
Loyalty & Membership Sign-Up
Product Guides & How-To Videos
Side-by-Side Comparisons
Specifications
|
Spec |
Details |
|
Screen Size |
4.2-inch E-ink Electronic Paper Display |
|
Resolution |
400 x 300 pixels |
|
Active Display Area |
84.8 x 63.6 mm |
|
Display Colors |
Black / White / Red |
|
Dimensions |
97.4 x 88.9 x 13.8 mm |
|
Weight |
94 g |
|
Battery Life |
5+ years (3-5 daily updates, replaceable) |
|
Battery Type |
3 x CR2450 |
|
Communication |
2.4 GHz Frequency Hopping |
|
Range |
30-50 meters (environment dependent) |
|
Operating Temperature |
0°C – 40°C (freezer-grade to -25°C available) |
|
NFC |
Supported (read/write) |
|
LED |
7 colors (Red/Green/Blue/Yellow/Cyan/Purple/White) |
|
Protection Rating |
IPX5 / IPX7 |
Intelligent Functions for Modern Retail
Instant Price Updates: Proprietary 2.4 GHz protocol ensures a 99.99% success rate for wireless price changes-respond to competitor pricing, time-based promotions, or dynamic markdowns in seconds, not hours.
Drag-and-Drop Template Editor: Design custom label layouts with text, images, barcodes, QR codes, and promotional banners. Preview changes in real time and push to individual tags or store-wide groups instantly.
Online Template Marketplace: Access a vast library of pre-designed templates tailored for supermarkets, pharmacies, electronics, fashion, and more-download and deploy professional layouts in minutes.
Multi-Page Content Switching: Pre-load multiple information pages (price, inventory, promotion, ingredients) and switch via physical button or remote cloud command-one compact tag delivers the depth of a full product card.
Smart Inventory Integration: Auto-location mapping, low-stock alerts, and heat-map analytics help managers optimize shelf layouts and restocking workflows from a single dashboard.
Versatile Mounting for Any Shelf
The 4.2" tag slides directly into standard shelf label holders used across grocery, retail, and warehouse shelving worldwide-no tools or modification needed.
Standard shelf-edge rail / label holder inserts
Peg hooks for hanging merchandise
Strong magnetic backs for metal racking and gondolas
Freezer clips and acrylic table stands for fresh zones
Screw-fixed or anti-theft mounts for high-value areas
Legoyo 4.2" ESL-Perfect For:
FAQ
Q: Why choose the 4.2-inch size over larger ESL tags?
A: The 4.2-inch is the global retail standard for shelf-edge pricing. It fits directly into existing label holders without modification, is lighter (94 g), costs less per unit, and enables full-store coverage-while still delivering NFC, 7-color LED, and multi-page smart features found in larger models.
Q: How long do the batteries last?
A: Three CR2450 batteries provide 5+ years of life with 3–5 daily updates. Batteries are fully replaceable, and the system proactively alerts you when levels run low-so you can plan maintenance ahead of time.
Q: Is the display readable in all lighting conditions?
A: Yes. E-ink technology uses ambient light reflection (like real paper) rather than backlighting. The 400×300 resolution on the 84.8×63.6 mm display area delivers crisp text and barcodes under any store lighting-including bright fluorescent fixtures and near windows.
Q: How reliable is the wireless connection in busy stores?
A: 2.4G frequency hopping + BLE 5.0 avoids Wi-Fi interference with 99%+ coverage-even in high-density environments. Infrastructure needs only power and internet; full store rollout typically takes 1–3 days.
Q: Can I customize the label design for my brand?
A: Absolutely. Our drag-and-drop template editor lets you design layouts with custom text, logos, barcodes, and QR codes. You can also choose from our online template marketplace with hundreds of industry-specific designs ready for immediate deployment.
Q: Will these work in cold or wet environments?
A: Standard models handle 0°C–40°C with IPX7 waterproofing. Freezer-grade versions operate down to -25°C for refrigerated cases, deli counters, and cold-chain warehousing.
Q: How does integration with my POS/ERP work?
A: Open REST APIs enable seamless two-way synchronization of prices, inventory, and promotions with your existing POS, ERP, or e-commerce platform-no workflow changes required.
Q: When will I see ROI?
A: Most customers recover investment in 12–18 months through labor savings, zero paper costs, and increased sales from better promotions and pricing accuracy. The 4.2-inch's lower per-unit cost accelerates payback compared to larger ESL sizes.
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