"Pointer Wireless Targus P16 Jangkauan hingga 15 meter. Technical Spec: 2.4 Ghz Cordless tecnology Laser Pointer Page Forward/Next slide button Page Backward/Previous slide button Dark Screen button On/off switch Ultra-slim wireless reciever 1 AAA battery System Requirement: Windows 10, 8/8.1, 7 Windows 2000, XP, Vista Mac OS X v10.4 to v10.12.3 Usb Port."