Automatic foam: This means the frother will automatically create milk foam with minimal effort from you. Use without touch: Likely refers to a one-button operation or a sensor that activates the frother when you add milk. Rechargeable battery: This lets you use the frother cordless for convenience. Charging type-c: This is the latest and most universal charging port, so you can likely use any type-c cable you already have. Liquid capacity 300 ml: This is a good size for frothing milk for a single or double serving. LED display: This could show you things like battery level, selected frothing mode, or temperature (if applicable). Waterproof: Makes cleaning easier and prevents accidental damage. 3 adjustable gears: This allows you to customize the frothing process for different types of milk or desired foam consistency (e.g., thick for cappuccino, light and airy for latte).