A Green Laser Pointer with extra 4 heads which may be attached to produce four different patterns: line, circle, arrow and positive sign. The heads are engraved to show what pattern would appear.

This pointer has a negative feedback circuit (APC = Automatic Power Control) that insures that the output power will not exceed 5mW. This makes them more suitable for indoor use.

It has a small green LED placed just above the "ON" button to show when the pointer is radiating.

This is not a toy - not for children.

All metal construction.

Metal gift box.

A glass collimating lens causes the "dot" to be sharply defined.

This pointer is NOT MADE IN CHINA.

The APC pointers have a negative feedback circuit (APC = Automatic Power Control) that insures that the output power will not exceed 5mW. This makes them more suitable for indoor use. It has a small green LED placed just above the "ON" button to show when the pointer is radiating. You need to start with a unit that has a nominal output of say 10-15mW and incorporate a sensor after the MCA and send a voltage back to the driver circuit that will establish a "setpoint" that represents a certain output level. The driver circuit then adjusts the current to the pump diode to achieve that level. This is in addition to the photodiode that is in the pump diode assembly itself which is used to keep the pump diode from going crazy (chaotic non-linier device that it is). An additional benefit feedback with headroom has is that the device is no longer subject to the "cool-down" rule and may be kept on continuously

This item carries a manufacturers warranty of 90 days. As the importer of record, I will honor that warranty myself.