2 Set Electronic Accessories: 1 x ESD5111 Governor & 1 x 3034572 Speed Sensor Model Number:3034572 Inductance value:42MH+25% Resistance value:300 Ohms MAX Thread:5/8-18UNF-2A Speed Sensor: Temperature range:-55 Degrees celsius to 105 Degrees celsius Idle output:1.5 volts AC Min MAX output:30 volts AC Range:50-5000Hz size:Length: 80mm ESD5111 Governor: Off-tooth distance:.028 in min.-.042 in max Model Number: ESD5111 name: speed controller ESD5111 engine speed regulator RPM stability: Less than ± 0. 25% Speed ​​range: 1 KHz ~ 7.5 KHz Thermal stability: Max ± 1% IDLE Regulation: 160 ± 20Hz DROOP Regulation: 15Hz ± 6Hz / Amp minimum Maximum: 400Hz ± 75Hz / Amp External speed regulation: ± 200Hz (with 1 K ohm connected) Auxiliary input sensitivity: 148Hz / 1V, ± 10Hz Impedance: 1M ohm Working temperature range: -40-85 Environment: Working humidity range: maximum 95% Average temperature: -55-92 Celsius Shocking: 20-100 HZ 500mm / sec. Input power supply Voltage: 12/24 V Ground post: negative post Power supply: 50mA Continuous Actuator Current: Minimum 2.5A, maximum 10A Signal: 0.5-120 RMS colour:Picture color Material:Plastic + metal Package Contents: 1 x ESD5111 Governor 1 x 3034572 Speed Sensor