More audio input ports mean that more audio devices such as microphones and keyboards can be connected at once.
BenQ LW61ST: 4
16. composite ports
The more composite ports a device has, the more devices can be simultaneously connected, such as video game consoles and set-top boxes.
NEC NC1200C: 4
17. USB ports
With more USB ports, you are able to connect more devices.
Optoma UHD51A: 4
18. has a HDMI output
Devices with a HDMI or mini HDMI port can transfer high definition video and audio to a display.
Epson EX5230 Pro
83% have it
19. zoom ratio
Projector zoom allows you to increase or decrease the size of the projected image without moving the projector. Bigger zoom ratio provides more flexibility. The most common zoom ratio among today's projectors is 1.2. With a 1.2 zoom ratio you can vary the image size by 20% by simply adjusting the zoom lens.
Epson PowerLite Pro Cinema 6030UB: 2.1:1
20. power consumption operation
How much power the device consumes when it's switched on.
JVC DLA-X30: 0.8W
21. has manual focus
This allows to manually set the focus.
Epson EX5230 Pro
71% have it
22. contrast ratio
Contrast ratio is the visual distance between the lightest and the darkest colors that may be reproduced on the display. A high contrast ratio is desired, resulting in richer dark colors and more distinctive color gradation.
Epson PowerLite Pro Cinema 6030UB: 600000:1
23. lamp life
This shows the lifespan of the light source. Beamers need to have their lamps (light source) replaced every now and then.
Vivitek Qumi Q7: 30000h
24. component ports
The more component ports a device has, the more devices can be simultaneously connected, such as video game consoles and set-top boxes.