Feature: 1. WORKING PRINCIPLE: The buoyancy and forward propulsion are generated by the vibration of the wings, which are pushed by the motor, so that the dragonfly wings vibrate up and down. 2. FINE PROCESSING: With high accuracy CNC process, aluminum alloy oxidation coloring, combining mechanical engineering and the power of insect wings, making it a collective handicraft. 3. SIMPLE ASSEMBLY: The DIY metal dragonfly model needs to be assembled by yourself, and you can operate it according to the instructions, takes about 1‑2 hours to complete the assembly. 4. BATTERY AND CHARGER: Equipped with 680mAh lithium battery and charging head for easy power supply, which can be used as a desktop decoration, very suitable for home bedrooms, offices, etc. 5. MULTIPLE USAGES: Adults can cooperate with children to complete, enhance parent child interaction, increase children knowledge, cultivate imagination, and develop logical thinking. Specification: Item Type: DIY Dragonfly Model Product Model: DM336 Main Material: Anodized Aluminum, Stainless Steel Process: Anodizing Charging Voltage: DC5V Battery: Lithium battery 603040 680mAh (included). Package List: 1 x Motor Cover1 x Base1 x Base Cover1 x Battery1 x Motherboard1 x Power Switch1 x Battery Tablet1 x Front Plate1 x Charger4 x Wings1 x Leg Bar1 x Motor1 x Rear Panel1 x Internal Gear1 x Dragonfly Tail1 x Long Shaft Connecting Rod1 x Longboard1 x Camshaft Fixing Plate1 x Internal Gear Fixing Plate1 x Lamp Socket Press1 x Longboard Fixing Plate1 Box Accessories (No. 025 to No. 073, see the manual and the actual product for details)1 x LED Patch Cord1 x Flower Board1 x Lotus4 x Lotus Leaf5 x Struts3 x Wrenches1 x Screwdriver1 x Plastic Tweezers1 x Lubricating Oil1 x User Manual Note: The colors of dragonfly is random.Received in pieces, you need to assemble it yourself.