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4.2" Smart Bluetooth E Ink Shelf Label – Budget-Friendly ESL | ET0420
Number of views:
1000
Product serial number
620420F8
Category
BLE Label
Quantity
-
+
OVERVIEW
SPECIFICATION
DOWNLOAD
BLE 5.0 · 5-Year Battery
4.2" Bluetooth
E-Paper ESL
Cut pricing labor costs by 90% with BLE 5.0 e-paper tags. Control via Android app or enterprise gateway. Open API, on-premise secure deployment, 5-year battery life.
90% Labor Saved
100% Price Accuracy
<18 mo. ROI
ET0420 Series · 4.2" E-Paper · 400×300 · BLE 5.0
Core Advantages
Wireless · Open · Durable · Color-Rich
01
Dual-Mode Control
Smartphone APP (no gateway needed) + Gateway version for enterprise-scale deployment.
02
Open API & Integration
RESTful API + MQTT+TLS for rapid integration with SAP, Oracle, Shopify POS, and more.
03
5–7 Year Battery
3×CR2450 coin cells, hot-swappable, 1800mAh total capacity for long-lasting operation.
04
4-Color Display
400×300 resolution, 119 PPI, >170° viewing angle. Monochrome, tri-color, quad-color, and waterproof options available.
Product Series
Choose the perfect model for your retail environment
Gateway：ET0420-87
Quad-Color · White Bezel
Centralized management, enterprise-grade
Gateway：ET0420B-87
Quad-Color · Black Bezel
Centralized management, enterprise-grade
App Version：ET0420-40B
Tri-Color
Mobile-integrated, flexible deployment
Gateway /APP：ET0420-43
Tri-Color IP67
Waterproof · For humid environments
Gateway：ET0420-42
Bi-Color · Fast Refresh
0-50°C · Faster update speed
Need a custom configuration? Contact our team for a tailored solution.
Built for Integration & Security
Our ESL system talks to your entire retail tech stack
Integrate with Any System in Days
RESTful API and MQTT+TLS natively support SAP, Oracle, Microsoft Dynamics, Shopify POS, NCR and any custom platform.
Full API Docs Sandbox Environment Dedicated Engineer TLS Encryption
Deploy on Your Terms
Cloud (AWS/Azure) On-Premise
GDPR compliant. Your data, your network.
Core Specifications
ET0420 Series — Key Parameters at a Glance
4.2" Display E-Paper
400×300 Resolution 119 PPI
>170° Viewing Angle
4-Color Display Options Monochrome/Tri/Quad
BLE 5.0 Connectivity 30m (open 50m)
5–7 Yrs Battery Life 3×CR2450
Hot-Swappable Battery Change User-replaceable
IP65 Ingress Protection IP67/IP68 optional
82g Weight
CE, RoHS Certifications FCC, MIC, SRRC
Open API & Flexible Deployment
- On-Premise: Data stays within your network, GDPR compliant
- Cloud Deployment: AWS / Azure ready, lightweight operations
- MQTT & Documentation: Complete integration docs, dedicated engineer support
- Enterprise Features: Audit logs, end-to-end encryption, multi-store management
We offer a full range of mounting solutions
- Mounting & Fixing Systems: Rail systems & shelf installations
- Display & Suspension Solutions: Stands, promos & hanging solutions
- Specialized Solutions: Magnetic, ice-insert & protective housings
- Click to learn more and let our specialists help you find the perfect fit!
Choose Your Deployment
Smartphone APP or Gateway – Full Coverage
Smartphone APP
$0 perpetual license, no extra fees
- No gateway needed (supports up to 50 tags)
- Direct BLE 5.0 pairing
- Free Android app
- Updates in seconds, ideal for small to medium stores
- Download APK
▶ Click to play
Most Popular
Gateway Version Scalable
For enterprise-grade deployment
- Supports 50,000+ tags per server
- Centralized management and control
- Open API for ERP/POS integration
- On-premise or cloud hosting
- Range: 30m (Bluetooth) ~ 2km (WiLoTa/LoRa 433)
▶ Click to play
Application Scenarios
From fresh produce to boutiques – one label, many uses
Retail Store
Dynamic pricing & promotions
Supermarket
Fresh produce pricing & inventory
Warehouse
Inventory tracking & management
Healthcare
Patient info & room signage
1.54"–13.3" Sizes for All Retail Scenarios
- Our ESL portfolio covers sizes from 1.54" to 13.3", with multiple color variants and feature configurations to suit diverse retail needs.
- Learn More
Keyword:
4.2 inch e-ink Labels Screen
Bluetooth Display
ESL Electronic Shelf Label
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