Type: A2217/8-bi 5 recommended number of cell: 3 – 4 LiPo/8 – 12 NiMH/NiCad RPM/V: 1750 RMP/V Max. Efficiency Current: > 80% Max Efficiency Current: 8: 28 A (> 70%) No load current/10 V: 1.6 a current capacity: a/60 s Dimensions: shaft diameter: Weight: G 4 x 70.8 G/2.49 oz.