Products Name:SPEDIX ES25 25A 2-4S Blheli_S FPV Racing Brushless ESC for RC Drone SPEDIX ES25 25A 2-4S Blheli_S FPV Racing Brushless ESC for RC Drone Spedix ES25 speed controller is designed for 150-280 size racing multirotors. The product is powered by high performance EFM8BB21 MCU, and flashed with the latest BLHeli_S program. With the combination of dedicated drive chip, this speed controller has excellent response speed and efficiency. The filter circuit of ES25 is composed of 12 low ESR capacitors, a number much more than competitors that use only 4-5 of them. As a result, ES25 has less current ripples and higher system stability, and less interference to wireless video transmitters. In additional to excellent design, ES25 is also made of top quality electronic parts. It is composed of 3 Oz gold plated PDB, and genuine components from estimated suppliers such as STMicroelectronics of Switzerland, and AVX of USA. Excellent design, authentic electronic components, and good manufacturer process all together make the ESC an excellent product with great quality, reliability, and stability. Furthermore, the size of the product is managed to be as small as most compact products in the market. Specification: Brand name: SPEDIX Item name: ES25 25A Brushless ESC Continuous Current: 25A Burst Current: 35A Voltage Range: 2-4S LiPo Firmware: BLHeLi_S Dimensions: 12.8X25.8X5 mm Weight: 5.9g Package Included: 1x ES25 BLHeLi_S 25A ESC