Product Dimensions:1 x 1 x 1 cm; 220 Grams Are Batteries Included:No Item Weight:220 g Guaranteed software updates until:unknown Package list: 1 * Set of Wood Cutting Parts 1 * Pack of Screws 4 * sg90 Servo Features: 100% brand new and high quality. 4 degrees of freedom robot arm with more untrammeled and flexible experience. Each joint of the mechanical arm is driven by a sg90 servo. Adopt wood material, with light weight. Ideal robot arm DIY assembly kit for college students, middle school students, DIY enthusiasts, etc. Specification: Model: SNAM1500 Weight: Approx. 222g/7.8oz Note: 1. This product does not include the circuit board. 2. Customers need to assemble the robot arm by themselves. Adopt wood material, with light weight. 4 degrees of freedom robot arm with more untrammeled and flexible experience. 100% brand new and high quality. Each joint of the mechanical arm is driven by a sg90 servo. Ideal robot arm DIY assembly kit for college students, middle school students, DIY enthusiasts, etc. See more product details Adopt wood material, with light weight. 4 degrees of freedom robot arm with more untrammeled and flexible experience. 100% brand new and high quality. Each joint of the mechanical arm is driven by a sg90 servo. Ideal robot arm DIY assembly kit for college students, middle school students, DIY enthusiasts, etc.