SPEED CONTROL Model No.: 20A Speed Controller Specification: Sustaining voltage: 6-17V BEC current: 3.0A Continuous output current: 20A Instant max current: 40A Inside impedance: 0.0066 O Reversion: yes Low voltage, cut electricity protection: yes Model No.: 30A Speed Controller Specification: Sustaining voltage: 6-17V BEC current: 3.0A Continuous output current: 30A Instant max current: 50A Inside impedance: 0.0044 O Reversion: yes Low voltage, cut electricity protection: yes