Remote Control Functionality: Simulate real submarine operations with easy-to-use remote controls, allowing forward, backward, floating, and diving maneuvers for endless aquatic adventures Automatic Power-Off Safety: Designed with an off-water power cut-off function, the submarine automatically shuts down when out of the water, ensuring safe and worry-free play Twin Propeller Power: Equipped with dual propellers, this submarine doubles its driving speed, delivering a powerful and exciting underwater experience Automatic Float Up: The submarine is engineered to float to the surface automatically if it loses power or is left underwater, extending the toy's service life and ensuring it won't get lost USB Charging Convenience: Easily recharge the submarine using the included USB cable, compatible with mobile phones, power banks, computers, and car chargers for versatile charging options Specification:_x000D_ Age: 8+ Battery life: About 5 minutes Product size: 9.5*7*5.5CM Signal: Radio frequency Battery: 3.7V 160mAh Li-On battery rechargeable Remote control battery: AAA battery x 2 Charging method: USB charging Charging time: About 40 minutes Remote control distance: about 6 meters Remote control frequency: 40/49 frequency Functions: forward (down), backward (up), left and right rotation, left and right fine adjustment, water discharge switch function