Feature: 1. Free presentations can be shown within the effective remote control range, which is suitable for computers with all USB ports 2. Plug and play, no need to install other programs, presentation pen can be used immediately. 3. Humanized design brings you excellent and comfortable feeling, which can get higher attraction. 4. Via precision craft by many experts, such a remote control pen is entitled with high performance according to strict rule. 5. Meanwhile, this PPT pen supports multiple operating systems and document page turning. Specification: Item Type: PPT pen Laser Beam: 3A laser Output Power: <5mW Laser Distance: 200m Laser Wavelength: nm (red) Working Voltage: 3.6V Sleep Current: <10uA Battery: Built-in lithium battery Battery Capacity: 300mAh. Package List: 1 x PPT Pen1 x USB Cable1 x Instruction Manual