The most frequently used electric kettles in high-end tea establishments in China are K*KOU kettles. This brand is famous for several reasons:

1. Speedy boiling: These electric kettles quickly heat water to boiling due to their high power and reliable quality.

2. Distinctive shrimp-eye design: Unlike ordinary electric kettles, K*KOU kettles do not cease to function and start reheating when the water temperature drops slightly after boiling. This ensures that the temperature of the water remains consistent, which is crucial for making tea. K*KOU electric kettles maintain the water temperature at a minimal power once it reaches the preset temperature, resulting in minimal fluctuations. This precise control over the water temperature is beneficial for tea making. When the kettle heats at a low temperature, tiny bubbles will form within the kettle, resembling shrimp eyes. This phenomenon is known as shrimp-eye water.

3. Reliable artistry: K*KOU is known for the quality and durability of its products. These kettles are highly robust and designed explicitly for Gongfu tea.

This information pertains to a top-quality product designed for Gongfu tea, which has been successfully used for many years.

Brand: K·KOU
Product Name: K·KOU TA011-A
Product Number: 10021514102064
Characteristic Traits: Heat preservation
Material: Single-layer stainless steel
Capacity: 1L
Type: Electric Kettle
Function: Automatic power-off 
Voltage: 220V
Power: 1500W