1. Power consumption figures will vary with your PSU's efficiency, the ambient operating temperature and the accuracy of the power meter. 2. If it is a warranty policy, a defective miner can repair it for free; after the warranty period, the machine needs to pay for repairs according to the actual situation. 3. AntMiners are LOUD. The L3+ sounds like a vacuum and is not recommended for use within homes. Many people use basements or sheds, 4. The following events will invalidate the warranty: Customer first removes/replaces any component by itself; damage caused by lightning or voltage surges; scorched parts on a stray board or chip; miners/circuit boards/components infiltrate due to wet conditions Or corrosion and damage. 5. Pay shipping fees when shipping replacement parts during the warranty period. 6. If you have any questions when receiving the package, please communicate with customer service.