Features 

• PIC16f628a microcontrollers
• Does not require batteries, Powered from the  ignition
• Standard FUTABA plug(Black-Negative Red-Positive and White-Signal)
• Using high-brightness LED digital display
• Input voltage range:3V-12V
• Current consumption 25mA-60mA
• Mini tachometer indicates up to 30,000 rpm
• Actual RPM= Display Digital *10
• Body Size: 41mm L x 17mm W x 12mm H
• Display Size: 30mm L x 15mm H
• Weight:8.5g (0.3OZ)
• Works with all RCEXL ignitions, New saito RCEXl ignition and OS30GT ignition

Instructions

1. Connect via Y lead (supplied) between the HALL sensor and the ignition.
2. Connect Tachometer plug into other end of Y lead (supplied).
3. Once ignition power is turned on, RPM will be displayed.

Note
That connecting plugs should be secured with clips/heat shrink/tape to prevent them coming apart due to engine vibration.

The hall sensor & tachometer wires need to be seperated from the Ignition high-voltage wire and receiver wires as much as practical.

The tachometer is not recommended for use in flight, it is best to remove the Y wire to restore the original sensor connection before flying.

If your ignition has an additional tachometer output, you should connect to the dedicated tachometer signal wire.