Infrared LED's projected on callers at 20. We respond to every question in timely fashion (within an hour in most circumstances).The item "Aiphone MK-DBC Semi-Flush Pan-Tilt Video Door Station" is in sale since Monday, March 23, 2020. This item is in the category "Home & Garden\Home Improvement\Home Security\Door Entry Systems & Intercoms". The seller is "smaa2014" and is located in Branson, Missouri. This item can be shipped worldwide.