Using the arduino uno development board and the small hammer remote control expansion board, you can control 6 mg996 servos, and with the ps2 remote control, you can realize the remote control of the robotic arm.
low cost arduino ps2 remote control kit
Provide arduino control program
Number of control servos: 6
Remote control distance 20 meters
Introduction to Robotic Arm
Maximum height of product: 400mm
Maximum opening of the clip: 52mm