ESC18A Output: Continuous 18A, Burst 22A up to 10 Secs Input Voltage: 2-4 cells lithium battery or 5-12 cells NiCd/NIMh battery BEC: 2A / 5V Linear mode Max Speed: 210,000rpm for 2 Poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM. BLM: BrushLess Motor Size: 45mm (L) * 24mm (W) * 11mm H Weight: 19g Features 1.Extreme low output resistance, super current endurance 2.Multiple protection features: Low-voltage cut-off protection / over-heat protection / throttle signal loss protection 3.3 start modes: Normal / Soft / Super-Soft, compatible with fixed-wing aircrafts and helicopters 4.Throttle range can be configured and is fully compatible with all transmitters currently available on market 5.Smooth, linear and precise throttle response 6.Our pocket-sized Program Card can be purchased separately for extremely easily programming the ESC at the field 7.With a program card, you can activate the music playing function of the ESC, and totally there are 15 songs can be selected