The test time may vary depending on the size of the vacuum bag, the capacity of the clothes, the battery and the mode There are 3 slots on the side to prevent the vacuum cleaner from overheating Compatible with Dyson V15 V11 V10 V8 V7 vacuum cleaners Does not apply to Omni-glide and the full range of V6 Works with vacuum bags with an inner diameter of the air outlet less than 2.8 cm Reduces the original space by 80% Note: The data are all measured manually, please allow an error of 1-3 cm due to differences in light and display, there may be some color differences, please refer to the actual item received.