1Fully aluminum alloy enclosure, anodized, can test analog and digital servos, can control ESC (motor stepless speed regulation test) 2It can simultaneously test whether 3 servos are synchronized (this function is mainly applicable to helicopter steering gear in CCPM mode) 3There are 3 modes to check servos or ESC 4It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on. 5You can also connect 1-3 ESC to test and compare their reaction time respectively.Features: Fully aluminum alloy enclosure, anodized, can test analog and digital servos,can control ESC(motor stepless speed regulation test) It can simultaneously test whether 3 servosare synchronized (this function is mainly applicable to helicopter steering gear in CCPM mode) Thereare3modestocheckservosorESC: Manualmode:turntheknobwithdifferentspeed,checkthereactiontime; Neutralmode:maketheservogobacktotheneutralpoint; Automatic"windowwiper"mode:maketheservoswinglikeawindowwipersinthebiggestangle. Itcanconnect1-3servossimultaneouslyandtestsuchas1-3servosconsistencyandsoon. Youcanalsoconnect1-3ESCtotestandcomparetheirreactiontimerespectively. Itcanconnect3servosoftheCCPMhelicopters,andselectservosby neutral and synchronous functions 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: Material: aluminum alloy Input voltage: DC4.8-6v Channel: 3CH Weight: Approx.28g/1oz Package list: 1 x 3CH ESC Servo Tester