Udirc Tempo Vehicle, Green This newest USB-rechargeable electric RC speedboat from UDIRC will blow the others out of the water when it races by at 25 km/h (15 mph) It features a rugged ABS anti-tilt hull, and a water-cooled, single-prop powerful 370-size motor that combines style, speed, and affordability Self-righting feature lets you keep your boat in play even if it capsizes Low battery alarm warns you when the boat is almost out of power so you know when to head for the shore