Weight:88g Dimensions:6.10in*0.51in*0.51in(15.5cm*1.3cm*1.3cm) Brand:LightsCastle Model:N/A Quantity:1 Light Color:Red Power:1mW Power Supply:2x 1.5V AAA Batteries Battery included:Yes Output Wavelength: 650 nm Fertures: This is the strongest laser pen that can be legally used in the UK. Great for office/school presentations. Point the laser at any desired targets on projection screens， video monitors etc Packing List:1x Laser Piont Pen<img src="http://112.74.112.28/down/products/428147/428147_000.jpg" noproxy>