REMOTE AND APP CONTROLRobot building kit can controlled by the phone APP bluetooth connection. With remote control mode, path mode, voice control, gravity sensor and stem programming,four remote control modes. This stem projects for kids joints are free to move, the head, shoulders, arms, elbows, tracks and eyebrows can be rotated, various expressive expressions can be arbitrarily placed. USB RECHARGEABLE DESIGNUSB charging design equipped with built-in rechargeable batteries in the stem robot. Comes with a 2.4GHz remote controller that has a range of 65ft radius and can move the robot in all directions (left, right, forward, backward, and full 360 rotation). Note : Remote control requires 2 AAA batteries ( Not included ). Excellent STEM Gift ToyBuild. Code. Play. Create and code the latest robot toy using snap together parts, servo motors plus updated gear movement system. This is the must-have toys for boys girls interested in engineering or likes to be creative. Perfect gift for birthdays, or fun present during Christmas. Both boys and girls age 8+ will have a wonderful time with this kids building toys.