美国采购需求：物联网智能无源锁、无线通信无源挂锁、门禁无源锁、安防电子智能挂锁、电力行业智能锁、基站智能锁

I'm interested in sourcing an intelligent lock system for access management solutions. It would be great to have a comprehensive overview of your product offerings in this category. I'm particularly keen on understanding the key features, such as user integration, security protocols, and any smart technology capabilities. Additionally, insights into installation requirements and compatibility with existing systems would be appreciated. Could you also provide information on pricing tiers for different models, bulk purchasing options, and current stock levels? If there are any upcoming products or updates in this area, I'd love to hear about those as well. I'm looking forward to your detailed response, which will help me evaluate our options. Thanks!