1PC 3CH Digital Servo Tester ESC Checker CCPM Consistency Speed Controler + 2PCS 4 Cell AA Battery Holder Case with 2P JR Connector Terminal for Helicopter Car (HJ Servo Tester)
 
Product Features
  

         
4 Cell AA Battery Holder Case with JR connector, very easy and convenient to use it. AA batteries are not included.
         
Battery Holder Rated Voltage: 6V, Interface: JR Plug.
         
Button the Select (Note: the key switch function, circulation patterns) 1. S-1 manual mode (Manual) 2. S-2-bit mode (Neutral) 3. S-3 automatic mode (Automatic)
         
Keys pulse width: 1. 50H analog servo signal cycle 20us frequency 50Hz 2. 125H digital the steering gear a signal cycle 8us frequency 125HZ 3. 250H Digital Servo signal cycle 4us frequency 250Hz
         
Connect: the battery holder red wire is to connect with "+" of "Input" of the servo tester, and black wire is to connect with "-" of "Input".