Features:Small in volume， easy to carryWith four servo interface sets， can test up to four servo at the same time.Using LED digital tube， can monitor the real time pulse width.Support for three working modes: manual， neutral & automatic mode.Specifications:Input voltage: 4.8 - 6VPulse width manual mode: 700 - 2300¦ÌsPulse width neutral mode is 1500¦ÌsPulse width auto mode: 800 - 2200¦ÌsMaterial: Plastic Color: BlackDimensions: 7.4*4.5*2.3cmPackage Content: 1 x LED Servo Tester1 x User Manual