This Wireless Presenter Laser Pointer features page up / down, full screen and black screen, build-in 300mAh battery, you can use for a long time, mini size, you can carry it to anywhere, it is worth for you to purchase this high quality presenter. Turn Page Function - Supports page up / down, full screen and black screen, up long press can achieve full screen or exit full screen, down long press can achieve black screen or exit black screen. Super Distance Operation - 100m remote control distance, up to 200m laser distance, easy to operate. Power Saving Design - Auto standby, deep sleep functions can save the power, special power switch design, it can prevent electric leakage from extruding button. Build-in 300mAh Battery - Build-in large capacity rechargable lithium battery, you can use your power cable of smartphone to charge it. Wide Compatibility - Compatible with Windows XP, Vista, SE, Windows 7/8/10, Android and iOS system. Portable Design - Chic and compact, easy to carry, fully support Powerpoint, Keynote and Prezi. Specifications Name Wireless Presenter Laser Pointer Brand Smart Slide Model DSIT007 Frequency 2.4GHz Control Distance 100m Laser Distance More than 200m Battery 300mAh lithium battery Working Voltage 3.6V~4.2V Charger Parameters 4.75V-5.25V 200-250mA