SPECS: Cells 6-12 NiCad/NiMH2-3s LiPo Continuous 100 amps Resistance 0.0003 ohms Brake Proportional Reversible Yes - with lockout Low VoltageCut-off Programmable Size ESC overall:1.9 x 1.3 x 1.2" Motor:1.4" dia. x 1.7" Weight(w/wires) ESC:2.5 oz (70.9 g) Motor7.0 oz (198.4g) Connector Type Universal