Arrma 390264 AR390264 BLX120 Brushless 4S ESC / The BLX120 120A waterproof ESC provides consistent power control and is 4S LiPo ready. Features fitted with super-reliable EC5 connectors, built-in cooling fan for reduced heat during intense driving action, over voltage protection, two-stage LiPo cut off for added cell management. Technical Specifications: Battery usage: 3S LiPo (11.1V) or 4S LiPo (14.8V), Low Voltage Cut-Off (LVC): 3.4V per cell, Thermal Protection Temperature: 125C / 257F, Over-Voltage Protection: Over 17.2V, BEC Voltage: 6V, BEC Current: 3A, ESC Length: 43mm / 1.69″, ESC Height: 34mm / 1.34″, ESC Width: 54.5mm / 2.15″ (Including hold-down tabs), ESC Weight: 150g / 5.3 oz, Receiver Wire Length: 170mm / 6.70″, Battery Wire Length: 225mm / 8.86″, Motor Wire Length (Including Connector): 200mm / 7.87″, Switch Length: 21mm / 0.83″, Switch Width: 13.3mm / 0.52″, Switch Height: 16mm / 0.63″, Motor Bullet Connector Size: 4mm / 0.16″, Wire Specifications: 12AWG, ESC Battery Connector Type: 2xEC5.