The difference of UDI023 VS UDI023 PRO:UDI023:Brushed power system;UDI023 PRO:Brushless power system - Description:Basic information - Brand:UDIRCItem No:UDI023/UDI023 PROColor:Grey-green and black-yellow color - Max Speed:14km/h(brushed version)20km/h(brushless version)Power ...The difference of UDI023 VS UDI023 PRO:UDI023:Brushed power system;UDI023 PRO:Brushless power system - Description:Basic information - Brand:UDIRCItem No:UDI023/UDI023 PROColor: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 servoTransmitterFrequency:2.4GChannel:4CHRemote Distance:80-100m - Required Battery:4X AAA battery(not included)Battery - Battery for The Boat:7.4V 2000m - Ah 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 653/659gDimensionBoat Size:335*127*111mm - Propeller Size:19mm