Specifications: Color: BlueMaterial: aluminum Light source: 650nm Laser+LED Emitted color: white (LED) + red (laser) Power: ≤5mw Range: 500 meters Battery type: 3 x LR4 cell battery Dimension: 10 x 10 x 9 mm (head x middle x tail) Length: 138 mm - With switch at the side - Functions: laser pen / ballpoint pen (black refill) / stylus pen (for capacitive screen device) / LED light (white color, luminous flux 10LM) Stylus pen function: suitable for all smartphones, tablets, and touch screen PC Note: Please remove the insulation film of battery for the first time use.