Udirc 2.4GHz High Speed Remote Control Electric Boat (Black) 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. The UDI001 is an exciting speedboat to see in action and even more exciting to pilot. Low battery alarm warns you when the boat is almost out of power so you know when to head for the shore. Low battery alarm warns you when the boat is almost out of power so you know when to head for the shore. Proper pairing of the emote to the RC boat. 1. Power on the transmitter. 2. You should hear a Di sound and the power indicator will light. 3. Now put the boat (with battery installed) into the water. 4. The boat will automatically turn itself on, and you should hear a Di, di, di sound. 5. The power indicator on the transmitter should be a solid light, which shows that code pairing between the boat and transmitter is successful and the boat is ready to operate.