Etti High Voltage 220A Opto PRO II Navy Competition Brushless ESC for up to 60 Volts. Specs: Voltage: 12 - 60 V NiMH: 10 - 40 Cells LiPo: 4 - 14 Cells Current: 220 Amp Battery Eliminator Circuit(BEC): NO Resistance: 0.001 £ Size: 100x65x22mm Weight: 315g (including wires & HV Cap's Module) (Ultra Low Resistance Version) This is a water resistant esc with water cooling for Fast Electric rc boaters. Requires: Connectors for both the motor and batteries. We suggest 8.0mm OSE or Castle Creations bullet connectors.Has no bec, so this will require an external battery eliminator circuit or a battery pack to power your receiver.NOTE: Pictures 2 and 3 show the esc with an attached capacitor board.The board is included but not installed. This is for example placement/installation purposes only.