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3 monitors side by side.

6 h a day
  • Electricity at €0.2832 per kWh (household price with taxes, Eurostat 2026-S1).
  • 210 g CO₂e per kWh generated in 2023 (European Environment Agency). Counts use only, not manufacturing.

Yearly running cost

Bars in proportion to the energy each model uses.

  • Sylvox RT40G3KOCA €15.51
  • Hannspree HL400UPB(HSG1467) €17.99
  • Uswing YXW3980 €19.23
Model Sylvox RT40G3KOCA Hannspree HL400UPB(HSG1467) Uswing YXW3980
Running cost
Running cost (per year) €15.51 €17.99 €19.23
over 10 years €155 €180 +€25 over 10 years €192 +€37 over 10 years
kWh per year 54.8 63.5 67.9
kg CO₂e per year from electricity use 11 13 14
Specifications
Brand Sylvox Hannspree Uswing
Model RT40G3KOCA HL400UPB(HSG1467) YXW3980
Energy class C D E
Screen size 40″ (101 cm) 40″ (100.3 cm) 40″ (101 cm)
Power in on mode (SDR) 25 W 29 W 31 W
Standby 0.5 W 0.5 W 1 W
Networked standby 2 W – 0 W
Off mode 0.3 W – 0.1 W
Resolution 1920 × 1080 1920 × 1080 1920 × 1080
Aspect ratio 16:9 16:9 16:6
Panel LCD LED LCD LCD
Refresh rate 50 Hz 60 Hz 60 Hz
Power supply External Internal External
Guaranteed support 1 year 8 years 1 year
Software updates 1 year 8 years 1 year
Spare parts available 1 year 8 years 1 year
On the market since April 15, 2026 January 31, 2022 July 8, 2026
EPREL registration number 2694092 1123233 2782098

Rows where the models differ are highlighted.