X2 DIRECT POWER SERVOOperating Voltage: 10 14v DIRECT POWER 3s max Operating Speed: 0. 120 sec 11. 1v Operating Speed: 0. 110 sec 12v Operating Speed: 0. 104 sec 12. 6v Operating speed: 0. 093 sec 14v Stall Torque: 581 oz in 11. 1v Stall Torque: 662 oz in 12v Stall Torque: 728 oz in 12. 6v Stall Torque: 787 oz in 14v Gear: Steal Motor: BLS Size: 40*20*37. 5mm Weight: 81g Connector Wire: TYU 300mm NO 4S batteries WATERPROOF IP67 25 tooth horn is required