Model comparison
Sertag S29 (868 MHz) or ZKONG Blade ZKC42B (4.2")?
Both models sit in the same display and colour class. The table below shows only the fields where they differ — identical fields are omitted because they do not help you decide.
Sertag
Sertag S29 (868 MHz)
2,9" 3 colours Entry level
Ağırlıklı olarak tahmini Last checked: 2026-08-13
Product page ZKONG
ZKONG Blade ZKC42B (4.2")
4,2" 3 colours Entry level
Kısmen doğrulandı Last checked: 2026-10-11
Product page Verified differences
| Field | Sertag S29 (868 MHz) | ZKONG Blade ZKC42B (4.2") |
|---|---|---|
| Display size | 2,9" | 4,2" |
| Display technology | E-paper (BWR) · Sub-1 GHz | İnce gövdeli e-paper (BWR) |
| Communications | Sub-1 GHz (433/868 MHz) | Bluetooth LE 5.x |
| NFC | No | Yes |
Differences resting on estimated data
In these rows at least one side was not published by the manufacturer and is estimated from the class average. If your decision rests on them, ask the manufacturer for written confirmation.
| Field | Sertag S29 (868 MHz) | ZKONG Blade ZKC42B (4.2") |
|---|---|---|
| Resolution | 296×128 estimated | 400×300 estimated |
| Full refresh time | 8 sn estimated | 5 sn estimated |
| Ingress protection | IP54 estimated | IPXX estimated |
| Minimum operating temperature | -10 °C estimated | 0 °C estimated |
| Thickness | 12 mm estimated | 11 mm estimated |
| Weight | 38 g estimated | 70 g estimated |
Where they match
These two models share a size band and colour capability. There is no meaningful difference in the fields below, so the choice cannot be made on them.
Claimed battery life: 5 yearsEnvironmental class: Standard retailLED colours: 3Price band: EconomySegment: Entry level
Which one fits you? A spec table alone cannot decide this — the answer depends on your store count, the aisle you will use it in and your existing systems. We supply both models; send us your scope and we will tell you which fits, and why.