1. Driven by 3.7V 300mAh lithium battery (included), it takes about 180 minutes to fully charge the battery, and it can run continuously for about 20 minutes. 2. The remote control requires 2 1.5V AAA batteries (sold separately), and the remote control has no interference and the remote control distance is about 20 meters. 3. Stainless steel material, safe. 4. Size: 27x13.5x11.5cm (after assembly). 5. A total of 952 pieces (including screws). Accessories: Remote control x 1 3.7V USB charging cable x 1 3.7V300mah battery x 1 Assembly instructions x 1 Circuit board box x 1 Tool x 2 Tank assembly (with screws) x 945