- Key-ring style<br />- Red 1mW red laser pointer<br />- 1*Blue LED and 1*white LED<br />- Blue LED can be use as a banknote tester、 Reveals watermarks hidden in bank / cash notes<br />- Two Buttons、 one for laser pointer、 one for switch between white and blue LEDs<br />- Powered by 3x LR44 cell batteries (included)<br />                                                                                                                                Dimensions: 0.55 in x 0.55 in x 2.52 in<br />Weight: 1.13 oz