These are super common and popular micro servos for all kinds of small-scale RC and robotics projects. You get 8 of them in the pack, which is great for building multi-servo projects like robot arms, walking robots, or having spares. Each servo is tiny and lightweight (9 grams), provides about 180 degrees of rotation, and has metal gears inside for better durability and torque compared to plastic gears. They operate on 4.8V to 6V, with a speed of roughly 0.11 sec/60 degrees. They come with a standard 3-wire connector (JR/Futaba compatible) and a 300mm cable. They're perfect for small RC planes, boats, cars, Arduino and Raspberry Pi projects, or any DIY gadget that needs precise angular movement. A fantastic value pack for hobbyists and tinkerers.