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4 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.

Electricity prices in all EU countries

  • CarTFT.com

    UM-1272C
    A 12″HDLCD / LED

    €11.16 per year

    +€9.24 a year

  • ASUS

    XG129C
    C 12″HDLCD / LED

    €3.72 per year

    +€1.80 a year

  • Cheapest to run

    ShenZhen ShiJiRongLi Technology Development

    Z1-2
    A 12″HDLCD / LED

    €1.92 per year

  • Shenzhen Kenowa

    HD-123
    A 12″HDLCD / LED

    €1.98 per year

    +€0.06 a year

Yearly running cost

Bars in proportion to the energy each model uses.

  • CarTFT.com UM-1272C €11.16
  • ASUS XG129C €3.72
  • ShenZhen ShiJiRongLi Technology Development Z1-2 €1.92
  • Shenzhen Kenowa HD-123 €1.98
Model CarTFT.com UM-1272C ASUS XG129C ShenZhen ShiJiRongLi Technology Development Z1-2 Shenzhen Kenowa HD-123
Running cost
Running cost (per year) €11.16 €3.72 €1.92 €1.98
over 10 years €112 +€92 over 10 years €37 +€18 over 10 years €19 €20 +€1 over 10 years
kWh per year 39.4 13.1 6.8 7
kg CO₂e per year from electricity use 8.3 2.8 1.4 1.5
Specifications
Brand CarTFT.com ASUS ShenZhen ShiJiRongLi Technology Development Shenzhen Kenowa
Model UM-1272C XG129C Z1-2 HD-123
Energy class A C A A
Screen size 12″ (31.2 cm) 12″ (31 cm) 12″ (31.2 cm) 12″ (31.3 cm)
Power in on mode (SDR) 18 W 6 W 3.1 W 3.2 W
Standby 0.5 W 0.2 W 0.1 W 0.5 W
Off mode 0.5 W 0.2 W 0 W 0.3 W
Resolution 1920 × 720 1920 × 720 1920 × 720 1920 × 720
Aspect ratio 8:3 16:6 8:3 8:3
Panel LED LCD LCD LED LCD LCD
Refresh rate 60 Hz 75 Hz 60 Hz 60 Hz
Power supply STANDARD EXTERNAL External External Internal
Guaranteed support 2 years 7 years 3 years 1 year
Software updates 2 years 8 years 3 years 1 year
Spare parts available 2 years 7 years 3 years 1 year
On the market since July 14, 2025 March 6, 2026 August 17, 2026 July 18, 2024
EPREL registration number 2415540 2504872 2822300 2083240
Energy class (HDR) – – – A
Power in on mode (HDR) – – – 3.2 W

Rows where the models differ are highlighted.