There have double side battey low indicator inside the boat. And controller with battery low indicator. With speedq limited control when driving, you can set up the highest speed. With strong motor. Strong power. With water cooling equipment when driving. There have protection function when boats broken by super electricity. Automatic function can the boat runs again when it overturning. Double layer waterproof. Spring water shape design. Features - Size: 33x12x7cm. - Material: PLastic. - Color: Red - Battery type：700mAh 4.8V - With speedq limited control when driving, you can set up the highest speed. - With strong motor. Strong power. - With water cooling equipment when driving. - There have protection function when boats broken by super electricity. - Automatic function can the boat runs again when it overturning. - Double layer waterproof. - Spring water shape design. Package list: 1 model 1 x remote control 2 x propellers