The Casio Pro Model Projectors have increased I/O connectivity, are DLP 3D Ready and have auto brightness adjustment to save power and reduce eye fatigue. They are interactive Whiteboard ready (USB models only.) By using the optional Interactive Pen with any white surface, whether whiteboard, screen or wall. Use the Interactive Pen as a PC mouse to scroll and click through software applications or as a pen to draw, write and annotate images. They also include RJ-45 wired LAN, wireless presentations and MobiShow, WLAN presentations from smart phones and mobile devices and presentations from your thumb drive. Product Type: DLP Projector Contrast Ratio: 1,400:1 Lamp Type: Laser/LED Projection Method: Ceiling Projection Method: Rear Projection Method: Front Product Type: DLP Projector Contrast Ratio: 1,400:1 Lamp Type: Laser/LED Manufacturer Part Number: XJ-H1750 Projection Method: Ceiling Projection Method: Rear Projection Method: Front Limited Warranty: 3 Year Weight (Approximate): 15.65 lb Color: White Manufacturer: Casio Computer Co., Ltd Product Model: XJ-H1750 Product Name: PRO XJ-H1750 DLP Projector Product Line: PRO Maximum Resolution: 1600 x 1200 Brand Name: Casio Optical Zoom: 1.2x Maximum Resolution: 1600 x 1200 Brand Name: Casio Country of Origin: China Height: 4.2 Width: 15.7 Depth: 12.7 Native Resolution: 1280 x 768 Number of Lamps: 1 Standard Mode Brightness: 4000 lm Graphic Mode: XGA Wireless LAN: Yes Native Aspect Ratio: 4:3 USB: Yes HDMI: Yes Operating Power Consumption: 430 W Video Signal Standard: HDTV Composite Video: Yes Network (RJ-45): Yes Video Signal Format: SECAM Video Signal Format: NTSC Video Signal Format: PAL Product Family: PRO Input Scan Format: 720p Output Scan Format: 720p 3D Type: 3D Ready VGA In: Yes Maximum Diagonal Image Size: 25 ft Native Resolution: 1280 x 768 Number of Lamps: 1 Normal Mode Lamp Life: 20000 Hour Standard Mode Brightness: 4000 lm Graphic Mode: XGA Wireless LAN: Yes Native Aspect Ratio: 4:3 USB: Yes HDMI: Yes Operating Power Consumption: 430 W Video Signal Standard: HDTV Output Scan Format: 720p 3D Type: 3D Ready Maximum Diagonal Image Size: 25 ft