I used it for about 12 hours as a trial. It's in very good condition, with no scratches or defects. VLM Equipped Smart Home Hub - SwitchBot, featuring a large-scale AI model, AI facial recognition technology, automation support, local storage, security and privacy focused, manages home appliances, NVR security system, remote operation, up to 16TB storage expansion, home monitoring system, video surveillance system, surveillance camera required, AI Hub