LP444B General Specs Color of Laser Red  PC System Support Window XP/Vista/Linux/Mac Receiver Type common Irradiated Range 200m Page-turning Support Yes Battery  Power by 1*AAA baterry included Remote control distance  10M Wavelength 650mm power  5mW Voltage 1.5V Install driver or not NO Package Details Weight: 111.28 g Size: 15.6*8.8*2.7 cm Package Includes 1 × Wireless Presenter Remote Control Red Laser Pointer 1 × Baterry 1 × User Manual