Input Voltages is up to 28V, also suitable to test servos；The load is to 100W. 4-way independent current date collection, support to test multipul date, speed, liner data, step,etc.Support multiple type, PWM/PPM/SBUS,the accuracy is accurating to 1us. With 4-way independent programable 8 channel output, the accuracy is accurating to 1us. Multiple language system, can change the language by yourself. ST8 is data tester which is capable to test the voltages, energy, current, speed and data of the Servos.