1. Size: The size of the car vacuum cleaner should match your own car. The existing car vacuum cleaners are divided into large and small. Generally, small cars can choose portable vacuum cleaners, and large cars (suvs) should choose large vacuum cleaners.

2. Power: According to the power of the car vacuum cleaner, it can be divided into three grades: less than 100 watts, 100~300 watts, and more than 300 watts. Generally, the purchase power of 60W can fully meet the requirements of use. If the dust is heavy, the recommended power is about 130W, which has the best practicability and the highest cost performance.

3. Cable length: The standard cable length of car vacuum cleaners is generally 2 meters. Many car owners ignore the cable length when purchasing, and only look at the machine and not the cable length. When they use it, they find that the cable is short. Generally, the cable length is recommended. At about 4.5 meters, it is enough to cope with the use of almost all vehicles.

4. Accessories: Many standard accessories for car vacuum cleaners are not enough. For example, some dead spots in the car are difficult to clean if the accessories are not complete. Therefore, it is best to consult the seller about the usage of accessories when choosing, and choose a few more. accessories, so as to completely clean the interior of the car.