1. Can be installed separately on the arms, or 4 ESCs installed together like a PCB under the flight controller. 2. Powered by high performance EFM8BB21 MCU. 3. Flashed with BLHeli_S program. It supports multishot/one shot42/oneshot125. 4. Dshot150/Dshot300/Dshot600 Compatible. 5. With 25AMp constant RMS, 30A max. 6. Designed to support 4-6s Lipo, but work well with 3S also. 7. Only 2.5 grams each piece and 10 grams for a set of 4 pieces.