tekins new rspro black edition 2 cell brushless speed controller Specs: Controls: Forward/Brake/Reverse Input Voltage RS Pro : 2-3S LiPo / 4-9S NiMH-NiCD Motor Limit Brushless Mode 2S: 36mm Can - 2-Pole Motor Limit Brushless Mode 3S: 36mm Can - 2-Pole Motor Limit Brushed 2S: 36mm Can - 540 & 550 Motor Limit Brushed 3S: 36mm Can - 540 & 550 Amperage: 480Amps per phase* ON Resistance: .000096ohm* BEC: 6.0 / 7.4V @ 5.5amps Weight: 1.23oz / 35g Dimensions: 1.0 x 1.3 x .68in / 24.5 x 33 x 17.25mm