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Specifications: Working Voltage: 3V-12V Working Current: 25mA-60mA Weight: 15g Size: 54mmL X 20mmL X 15mmH 1.Use PIC 16F628a Microcontrollers 2.Small Vokume, Convenient to Carry 3. Do Not Need Betteries, Power from Itself 4. Standard FUTABA Plug (Blacl-Negative, Red-Positive, and White-Singal) 5.Use 4 Digital Tube to Monitor the Engine's Speed 6. Mini Tachometer Indicates Up to 3000rpm 7. Actual RPM=Display Digital*10 8.Increased Self Test Feature
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