SPACEBEE-99, also known as SpaceBEE-99, is a 0.25U CubeSat communication satellite launched by SWARM on June 30, 2021, from the Air Force Eastern Test Range LC40 using a Falcon 9 launch vehicle. The spacecraft measures 0.025 meters in length, has a diameter of 0.1 meters, and spans up to 0.9 meters with its two antennas. It weighs approximately 0.284 kilograms both at launch and when dry. Power is provided by solar cells and batteries, and it serves the purpose of Machine-to-Machine (M2M) and Internet-of-Things (IoT) communication missions. The satellite's shape consists of a box with two antennas attached.