Graupner Ultra Control 30A 2-4S is an affordable standalone ESC without BEC. It is suitable for RC aircraft models. The ESC supports 2-4S LiPo batteries and can handle current up to 30A.
Thanks to its dimensions of 27x14x8mm and weight of 4g without cables (8g with cables), it can be easily installed in any model.
The ESC is equipped with a Silabs processor and uses open-source BLHeli_S firmware. It recognizes standard PWM signals from the receiver as well as DShot protocols. Settings are configured via a computer using the BLHeliSuite configurator; a USB adapter or flight controller is required to connect to a PC.