Here are some common features of household hair clippers:

1. Cutting lengths: Many clippers come with adjustable comb attachments that allow you to trim hair to different lengths. Some models may also have attachments with different blade sizes for finer or coarser hair.

2. Blade quality: High-quality blades are important for a smooth and clean cut. Stainless steel or titanium blades are durable and long-lasting.

3. Power source: Some clippers are corded, while others are rechargeable and cordless. Cordless clippers offer more flexibility and ease of use, but may have shorter battery life.
   

4. Noise level: Some clippers can be quite loud, which can be a drawback for some users. Look for models with low noise levels or those that are designed to reduce noise.

5. Weight and ergonomics: The weight and shape of the clipper can impact its ease of use, especially if you plan to use it for extended periods of time. Look for clippers that are lightweight and have ergonomic designs for comfortable use.

6. Attachments and accessories: Some clippers come with a variety of attachments and accessories, including combs, scissors, and cleaning brushes. These extras can be useful for different hair cutting and styling needs.

7. Price: Hair clippers can range in price from a few dollars to several hundred dollars. Consider your budget and what features are important to you when choosing a clipper.