The Sentinel 650 Pro is a quadcopter manufactured in the United States by CRLC UAV, designed for hobbyists looking for a high-quality and reliable RTF flying experience. This is a highly capable drone that can be upgraded and adapted to many use cases. Since 2015 We have built and sold over 3,000 of these drones with thousands still in service today. These are hand built and flight tested before shipping with a 30 day lead time per order.