Being phosphorescent, the device draws on light from well-lit places to emit light for a few minutes in darker applications Accessory (Fixing band) The device has a magnet for use in pinballs for out of line perpendicular angles Use in out of line perpendicular angles by attaching the device to wooden or aluminium gauge poles. Use in out of line perpendicular angles by attaching the device to aluminium gauge poles. Specfications ·F/R/R/L measuring ·Fixing band ·Magnet ·4-line acrylic l air bubble tubes Sensitivity / Accubacy Sensitivity 0.50mm/m=0.0286˚ Accuracy: Within ±2.50mm/m±0.1432˚