Features: Wireless Control: Adopting 2.4GHz wireless technology, the remote distance is up to 70 meters, with high sensitivity, plug and play, ideal for various PPT display scenes, such as classroom teaching, lecturing, training, making a speech, etc.  Supported Functions: The PPT clicker support volume control, page up, page down, black screen, full screen, play slides, with indicator light to show different states, very convenient and practical to use.  Practical: With green pointer, can let everyone in the room focus on important points of your PPT and make your speech more excellent; The wireless presenter with USB receiver, magnetic suction design, can be stored in the presenter pen.  Rechargeable Design: Built-in 300mAh rechargeable battery, supplied with a USB charging cable, no need to replace batteries, more environmentally friendly and economical.  Elegant & Portable: Aluminium alloy shell, with embossed buttons design, easy to use; Comes with a PU protective sheath, portable size, convenient for carry.   Specifications: Main Material: Aluminium Alloy;  Remote Control: Radio Frequency Technology;  Wireless Technology: 2.4GHz;  Remote Distance: ＜70m(depending on environment);  Operating Voltage: 1.5V;  Supported System: All Windows 7/8/10, etc; Mac OS Systems;  Battery: Built-in Rechargeable Lithium Battery 300mAh, 3.7V;  Voltage: 3.6V-4.2V;  Charging Time: About 3 Hours;  System: Support Windows 7/8 or above, Mac OS;  Sleep Current: ＜10uA;  Item Size: 13.5 * 2.5 * 1.2cm / 5.3 * 1 * 0.5in;  Item Weight: 48g / 1.7oz;  Package Size: 16.5 * 8 * 3.5cm / 6.5 * 3.1 * 1.4in;  Package Weight: 144g / 5.1oz;   Note: When working with MAC OS system, only whip and page flipping functions may be available.   Package List: 1 * Wireless Presenter(with USB Receiver);  1 * USB Charging Cable;  1 * Storage Bag;  1 * User Manual(Chinese & English) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store