Flame retardant metal chassis: High temperature resistant, does not deform; metal construction resists rust, effectively withstands high temperatures and heavy pressure to help reduce potential safety risks. Easy to use with infinitely variable speed adjustment for precise control without gear restrictions. Back mounting hole design is user-friendly, allowing for flat placement or convenient hanging. Suitable for use with household appliances, industrial equipment, scientific instruments, factories, schools, and other electrical devices. Slight color variations may occur due to different production batches and printing fonts; this does not affect functionality. Plug Type: EU Plug, suitable for use in Indonesia, Germany, France, Spain, Italy, and other countries with compatible outlets. Voltage: AC 220V Color: As shown in photo Material: Metal Package Contents: 1 x Adjustable voltage regulator Note: Other items not included. Color may vary slightly due to lighting and display settings. Measurement error allowance: +/- 1-3 cm.