This is a four-free metal robotic arm. using the mg996 steering gear. which is powerful. The robot arm has claws that can grab something. Each servo can move 180 degrees. the movement angle is relatively .The internationally-used for is used as the control board. and our uniquely designed potentiometer knob control board is used to control the four servos. The threshold is very low.About assemblyThis product does not require welding. no additional equipment. no additional tools. we provide a complete graphic tutorial for everyone to use as a guide.mg996 steering gear. relatively powerFor control. universalFour knob control. low threshold for useDistribution power adapterAssembling: We provide online and Chinese-language assembly tutorials and videos in Chinese and English. and are constantly updated and maintainedPower supply: Use the 5V2A adapter provided by us. or use the USB-to-DC conversion cable provided by us to use our own power bank. Charging treasure requires a minimum 2A current output.Program: the program has been burned at the factory. and the program source code is provided for downloadWelding: We have a welding part in our tutorial.Maximum extension length of the robotic arm: 23cmMaximum opening size of clip: 7.5cmColour:blackMaterial:MetalSize:14.5X9.5X14CMPackage Contents:1 x Robotic Arm KitOnly the above package content. other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.