Operating

• Install the knock sensor/s in a suitable location on the engine (typically on a solid mounting point on the block near the cylinder head)
• If only using one sensor, leave the unused sensor cable disconnected
• Turn the volume control clockwise until it clicks. The LED indicator will turn blue when the KnockBlock is operating
• Turn the volume to the minimum setting (most anti-clockwise)
• Connect headphones to the 3.5mm audio jack
• Run the engine and carefully increase the volume (clockwise) until engine mechanical noise can be heard. Adjust to a comfortable listening volume

Charging

• Turn off the KnockBlock by turning the volume control anti-clockwise until it clicks
• Connect the USB charging cable to the KnockBlock’s Mini USB connector. Can be charged from any standard USB charger PC, laptop, car or cell phone charger (2.1A at 5V max)
• The LED indicator will show red while charging. When the indicator turns off the battery is fully charged
• Charge the G4+ KnockBlock after use and before storage