Mini Tracer Unit, Low Battery Reminder Film Props for 11mm CW 14mm

Mini Tracer Unit, Low Battery Reminder Film Props for 11mm CW 14mm CCW  (no Pattern) Tracking Function and Application: The tracer unit has a built in motion sensor and can maintain up to 35RPS (2100 RPM) tracking function, and can be adapted to 11mm CW (not included) and 14mm CCW (not included). Advanced Technology: This machine adopts high power UV LED...