Specification Detection Form Infrared Rays Resolution (Non-physical) 4096*4096 Interface Type USB 2.0,Wireless 2.4G RF(Optional) Cable Length 6000mm Working Environment Working Under Sunlight Directly Connector Type USB1.1A, Wireless 2.4G RF (Optional) Scan Periods 45-70Hz How to Supply It From USB PORT of PC PowerLess than 90ma at 5V Temperature RangeOperating -30 - 80(Temperature Slope Less than 25C/Hr) Storage -30 - 85(Temperature Slope Less than 25C/Hr) Humidity Operating 0%-85%, Noncondensing Storage 0%-95%, Noncondensing ESD Capability Contact Discharge Voltage is 4KV, Air Discharge Voltage is 8KV Warranty 3 years Limited Warranty Device Driver Version # DL-USB (2.0) Scanning Form Auto Start, Always Scanning Responding Speed First Point 25ms, Consecutive Point 8ms Easy WriteSoftware Optional Firmware Optional Version# Latest Available Pictures Hardware Outstanding Features NoSensors onSurface Intelligent Laser Pointer No External Power Supply No Additional Purchases Needed Fast Data Transfer Rate High Accuracy RepresentationUSBCable Extensions Intelligent Hand-gesture Recognition Accessories >>more >> where to buy >> optional function