This is a modified Rc servo to run off two wires. I took out the electronics inside and just ran the wires straight to the motor so you just need a 6 volt battery and switch to make it move. No computer boards or any fancy electronics inside to go bad.
So you can use a DPDT toggle switch which is sell in my other auctions to reverse the motor as you can see in the video below.
Package includes everything you see in the pictures
one MG995 servo with the mounting hardware.
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