Specification:?Type: Ignition Timing Light Quantity: 1 PC Material: ABS Color: Black and Red Input voltage: 12V Trigger point: high volt coil of No.1 spark plug Speed: up to 10000rpm Working temperature: 0-40℃ Speed: 200-10000r/min Size: 18.0*12.0*5.0cm/7.1*4.7*2.0” (L*W*H)