肯尼亚采购需求：基于IP的别墅可视门铃对讲机

I'm reaching out to get a quote for a four-button intercom system without the indoor stations. We're looking into bulk purchasing options, so any pricing tiers or discounts you can offer would be helpful. Additionally, if you could provide info on lead times and payment terms, that would be great. A prompt response would be really appreciated as we're keen to move forward quickly. Thanks!