features good over-charge and over-discharge protection. If you want to have vivid and excited boat racing, you should not miss it out.Features:New high speed RC boat, speed up to 45km/hEasy operation, long lifespan and high stabilityWater cooling and self-righting system, safe and reliableNew design idea, novel appearance and exquisite workmanshipEquipped with super power ESC,2815brushless motor and large capacity lithium batteryESC system has been designed with protection to avoid damage from over-current, over-voltage, low voltage, motor blocked,etc