Direct power from 2s to 4s LiPo!7.4v - 16.8The model A is overdesigned for durability and power with oversized gears and dowel pins. It's built to handle the abuse of the toughest, solid axle monster trucks and rock bouncers, also excellent for those wanting to use a smaller esc but not sacrifice turning power. Your model A will include a high quality silicone wire lead to solder to your esc input for direct power.-- Direct power to run directly from your battery-- 25T output spline-- 2mm dowel pins-- Large, high-precision steel gears-- Full CNC aluminum hulls and structure-- High quality brushless motor-- triple ball bearings-- Water proofSPECIFICATIONS:***Listed specs are the consistent outputs under heavy use and NOT the inflated highest numbers commonly used by other brands.***Operating Voltage: 7.4-16.8 VOperating speed: 0.15sec/60° @ 8.4V 0.13sec/60° @ 11.4V 0.12sec/60° @ 12.4V 0.10sec/60° @ 16.8V Stall Torque: 560 oz-in @ 8.4V 720 oz-in @ 11.4V 768 oz-in @ 12.4V 832 oz-in @ 16.8V Dimensions: 40*20*41.5mmWeight: 3.2oz Connector Wire Length: 6"