First of all, the UDI022 Tylosaurus Boat is an upgraded version of the UDI005 Arrow boat. They are identical in size. But for the internal chip control, motor, ESC, battery, and tail power unit, the UDI022 has been upgraded and optimized. The comprehensive performance surpasses UDI005 in an all-around way. 1. The UDI022 ESC is upgraded to a 120A waterproof ESC, which supports 3S and 4S batteries at the same time. This is very convenient for model lovers to upgrade 4S batteries. But UDI005 needs to modify the ESC and motor to use a 4S battery. 2. The power unit at the tail of UDI022 is all upgraded to metal material. Compared with the plastic tail rudder, plastic propeller, and plastic navigation rudder of the old version UDI005 remote control boat, the upgraded metal version at the tail of UDI022 is more resistant to mold, stronger in hardness, and more accurate in controlling the stability of the high-speed navigation of the remote control boat. 3. UDI022 Upgraded tail night light mode. Compared with the old version of UDI005, UDI022 can sail at night, which enhances the fun of playing at night. 4. The motor part of UDI022 adopts MDW.3554A.1800KV brushless motor and supports 3S or 4S batteries.