The difference of UDI023 VS UDI023 PRO: UDI023:Brushed power system; UDI023 PRO:Brushless power system Description: Basic information Brand:UDIRC Item No:UDI023/UDI023 PRO Color:Grey-green and black-yellow color Max Speed:14km/h(brushed version) 20km/h(brushless version) Power System UDI023 Version ESC:Two in one received esc box Motor:SRC-390SM-5022-66D brushed water-cooled motor Servo:9g 3 wires high speed digital servo UDI023 Pro Version ESC:80A independent brushless esc Motor:HS2812-3500KV brushless water-cooled motor Servo:9g 3 wires high speed digital servo Transmitter Frequency:2.4G Channel:4CH Remote Distance:80-100m Required Battery:4X AAA battery(not included) Battery Battery for The Boat:7.4V 2000mAh XT30 plug Li-ion battery(included) Battery Charging Time:About 230 minutes Battery Playing Time:Approx. 9-10/7-8minutes(brushed/brushless version) Other Material:PA+metal+electronic parts Iron trannsmission Dead Rise Angle:32 degrees Boat Weight:About 653/659g Dimension Boat Size:335*127*111mm Propeller Size:19mm Remote Controller Size:130*63*180mm Function: The 362mm long shallow V-shaped hull design features a high-strength ABS simulated hull, strong jet pump power, and superior underwater performance. Able to navigate freely in shallow and rock areas, without fear of collision and entanglement of various underwater obstacles. Spray pump structure, controllable navigation lights, anti-collision rubber strip, simulation design, one click acceleration, one click return to normal after capsizing, water cooling system, low power alarm, over distance alarm, forward and backward, turn left/right Features: 1. Go forward and backward. Turn left and right 2. Self-right capsize 3. over -distance alarm prompt 4. Low -voltage alarm reduction tips 5. Water cooling system 6. LED Light Control System 7. Waterproof design Package Included: 1X RC Boat(Brushed or brushless version is optional chosen by yourself) 1X Battery 1X Remote Controller 1X Instruction Manual 1X Display Bracket 1X Propeller 1X US Plug Balance Charger(if you are not US area,we will provide adapter for you) 1X Allen Wrench