Specification: Item Type: presenter Product Model: R400 Laser Range: 600m Remote Control Distance: 100 meters Transmitter Power Supply: Two AAA batteries (without batteries) Battery Capacity: 1150mAh Voltage: 3.6V-4.2V Package List: 1 x Laser Presenter 1 x Manual 1 x USB Interface Note: Transmitter battery is not included. 1. Convenient and Practical:Integrated plug-in acceptance makes this wireless pointer easy to use, no need to install the driver, which is ready to use. 2. Easy to Use:For easy battery replacement of two AAA batteries(not included), with battery replacement reminder, such PPT pen is with easy battery replacement, economical. 3. Clever Design:Wireless Electronic Pen support one-click hyperlink, this remote control pen can be easy to use in practicality. 4. High Quality:1150mAh battery capacity provides laser presenter long endurance for energy-saving. 5. Perfect Experience:Entitled with pratical adoptability, the remote control pen supports page turning for extreme user experience.