E-MAXX Brushless ESC (Waterproof Mamba MXL-6S Monster Castle e-revo Traxxas 3908 Genuine Traxxas Replacement parts Input voltage: 6S LiPo (Max 25.2 Volts), 18 NiCd/NiMH (Made by Castle Creations) FAN must be removed before water play. Fan is not waterproof. (mounting hardware sold separately in our screw kit)