【Excellent Design】 product size (13.27x7.28x7.6in), weight: 3.3 lb (1.5 kg)Battery: 3.7V 300mAh. The handheld remote controller needs to be installed with 2 AAA batteries (not included). The maximum distance of the remote controller is 66 feet (20 meters). It supports two Bluetooth remote control operation modes: handheld remote control and mobile app.【Installation】This building block set has detailed installation instructions, and different types of building blocks are packed in different bags, improve children's imagination and creativity by challenging children to build their own robot dog with 936 easy-to-assemble parts and accessories . In the process of assembling the toy bag, children can experience the joy and sense of achievement brought by the constant conquest.【Safe and Durable Materials】the intelligent robot dog is made of high-quality environmental friendly ABS materials, with a smooth surface, which will not cause physical harm to children. The safe and non-toxic ABS plastic is durable, and the building block toy built is strong in structure. After completing the work, you will get perseverance, care, determination to overcome difficulties, and joy of growth and victory【Operation】: The intelligent robot dog building block adopts a mechanical transmission structure, high-performance motor and intelligent chip, which can move forward in the background, turn left, turn right, rotate in place, and act according to the control instructions, which can be like an intelligent robot【Accessories】: intelligent building block module, remote controller, special USB charging cable, building instructions and building block parts package. The intelligent robot dog building block set is a * gift for children on birthday / children's Day / Christmas / New Year / Hanukkah / Easter / summer camp activities / back to school.