MOQ flexible. Bulk orders get additional discounts. OEM branding available.
4.2" flagship ESL size — the most popular for 3C retail demo units
400×300 resolution — can display product images, full specs, and pricing
4-color BWRY for high-contrast sale tags and promotional displays
2.4GHz centralized update — manage entire store from one platform
5+ year battery life — zero maintenance over display unit lifecycle
IP54 rated — reliable in high-traffic 3C retail environments
Perfect for flagship phone displays, tablets, smart home devices
| Display Technology | E-Ink (Electronic Paper) |
| Screen Size | 4.2" |
| Resolution | 400×300 pixels |
| Display Colors | Black / White / Red / Yellow (4-color) |
| Communication | 2.4GHz SDR Wireless |
| Gateway Required | Yes — CEDAR V3 AP |
| Battery Life | 5+ years (typical usage) |
| Update Speed | < 0.3s per tag |
| Operating Temperature | -10°C to +60°C |
| IP Rating | IP54 (Dust & Splash Resistant) |
| Material | ABS plastic housing |
* Specifications subject to change without notice. Contact us for the latest datasheet.
SLIM-420BWRY Electronic Shelf Label — 4.2" E-Ink electronic shelf label (ESL) featuring Black / White / Red / Yellow (4-color) 4-color display. Powered by 2.4GHz SDR (SLIM Series). CEDAR V3 AP (required). Battery life up to 5+ years. IP54 rated for dust and splash resistance. Operating temperature: -10°C to +60°C. Ideal for 3C flagship stores, electronics retail, appliance showrooms, smart home.
Tocvue ESL labels use ultra-low power E-Ink (electronic paper) technology — the same display used in Kindle e-readers. The screen only draws power when the content changes, resulting in a 5+ year battery life. No backlight needed — paper-like readability from any angle, even in direct sunlight.
The SLIM-420BWRY is available in two connectivity versions: SLIM Series (2.4GHz) requiring the CEDAR V3 AP gateway for centralized management of hundreds of tags, and BLE Series (Bluetooth 5.0) requiring no gateway — controlled directly from a smartphone app. Choose the version that best matches your store size and deployment requirements.
Factory-direct from Tocvue — professional ESL manufacturer since 2014. Contact us for wholesale pricing, sample units, and OEM customization.
Contact us for wholesale pricing. MOQ flexible. Samples available.
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