... 2) Perfect for teachers, students, engineers, doctors, managers and Etc. 650nm Laser Pointer for Presentation use (RLP-702) ... Parameter: Fixed focus, Red dot facula, continuous output and working time over 5000 hours 9) Support: Temperature control ... 5km13) Function: Used in many applications and industries including the military,medical and astronomy,indicator, teaching baton. Functions: Packing ...