30A Brushless ESC: Output: Continuous 30A, burst 40A up to 10 Secs. Input voltage: 2-4 cells lithium battery or 5-12 cells NiCd/NIMh battery BEC: 2A / 5V (Linear mode). Max speed: 210,000rpm for 2 poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM. (BLM: Brushless Motor) Size: 45 * 24 * 11mm / 1.8 * 0.9 * 0.4in Weight: 25g / 0.9oz Item total weight: 480g / 1.06Lbs CCPM Servo Consistency Master / Servo tester The device also can be used as a signal generator for electric speed controller (ESC), then you can test your motor system without using a transmitter and receiver. There are 3 modes to check servos or ESC: Manual mode: turn the knob with different speed, check the reaction time. Neutral mode: make the servo go back to the neutral point. Automatic "window wiper" mode: make the servo swing like a window wipers in the biggest angle. It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on. You can also connect 1-3 ESC to test and compare their reaction time respectively. It can connect 3 servos of the CCPM helicopters and select servos. It can also connect the servo of airplanes install the steering-box and adjust planes by using such as the neutral mode and so on. Specification: Voltage consumption: DC4.8-6V Size: 48 x 42 x 17mm Original box: NO Color: Blue Item size: 48*42*17 mm Net weight: 7g Packing Content: 4x 30A Speed Controller ESC 1 x multi Servo tester