The new TTech Emax GT series brushless motors feature more power and efficiency than previous Emax motors. Motors include accessories for: Backplate mounting with bolt on prop driver or standard mounting. Collet style prop driver. GT2215/12 KV: 905 Battery(Lipo): 2-3S Shaft Diam: 4mm Prop: APC 10 x 4.7 / 11 x 3.8 Max Watts: 216 Max Thrust: 1050g Weight: 70g Model Weight: 600 - 900g