301 405nm 5mw Purple Light Adjustable Focus Laser Pointer+Keys

Features:
1. It is used to point at any desired target on projection screen, video, etc.
2. It can be used for presentation, teaching indicator, etc.
3. Across the sky, leading you to find the stars in the clear nights.
4. Lightweight, suitable for putting in your pocket or handbags, easy and convenient to bring.
5. This high quality laser pointer adopts the latest technology optics and microelectronics.
6. Designed with purple color light, which is easier for you to find the target and outlight the key point.
7. The copper at the end is fixed by aluminium sheet, which avoids short-ciruit.
8. Power-saving: with a key to lock the laser to avoid power loss -- when the key points at the red point ~ lock (green point~unlock).
9. Designed with a waterproof sealed ring at the end, which keeps water from running into it