The new DYS XM20A V2 ESCs are specially designed for high KV power racing motors. Small size and easier installation. Matched perfectly with the new DYS BX1306 and MR2204/ 2205-2300KV brushless racing motors. Specs Input voltage: 3-4s Lipo BEC: NO Size(mm): 24L*14W*4.5H Type: BLHeli Bootloader & Firmware Weight: 5.8g