The Acer K335 is also equipped with a SD card reader and a USB port allowing multimedia playback directly from a USB drive or memory card. Plus, with built-in office and PDF document reader support, they can project Office or PDF files without using a PC. Users can watch and share a variety of multimedia contents, including photos, audio and videos without the added burden of a notebook.
Specifications
General 
Device Type: DLP projector - HD
3D Capable: Yes
Built-in Devices: Speaker, card reader
Enclosure Color: White
Projector Brightness: 1000 ANSI lumens
Brightness (Reduced): 800 ANSI lumens
Contrast Ratio: 10000:1 (dynamic)
Image Size: 29.9 in - 100 in
Projection Distance: 3 ft - 10 ft
Uniformity: 90 %
Digital Zoom Factor: 1.7x
Resolution: WXGA - WXGA (1280 x 800) (native) / 1920 x 1080 (resized)
Native Aspect Ratio: Widescreen
Color Support: 1.07 billion colors
Max Sync Rate (V x H): 120 Hz x 100 kHz
Lamp Type: LED
Lamp Life Cycle: 20000 hours / 30000 hours (economic mode)
Features: High-bandwidth Digital Content Protection System (HDCP), wall color correction, built-in 1GB flash memory, DLP 3D Ready, Auto Vertical Keystone, SmartFormat Technology, 16:9 aspect ratio support, DynamicBlack technology, 4:3 aspect ratio support, Auto Power Off, Acer ColorSafe II Technology, MHL compliance
Lens Focus Type: Manual
Lens Aperture: F/1.5
Keystone Correction Direction: Vertical
Vertical Keystone Correction: -40 / +40
Video Input TV System: PAL-B/G, PAL-N, PAL-M, PAL-I, NTSC 4.43, NTSC 3.58, PAL-D, SECAM L, PAL-H, SECAM K1, SECAM D/K, SECAM B/G
Analog Video Signal: RGB, composite video
Video Interfaces: VGA, HDMI, composite video
Video Modes: 480p, 720p, 1080i, 1080p, 480i, 576i, 576p
Supported Memory Cards: SD Memory Card
Speakers Type: Integrated
Sound Output Mode: Mono
Output Power / Channel: 3 Watt
Speaker(s): 1 x mixed channel
Expansion / Connectivity Expansion Slot(s): 1 x SD Memory Card
Interfaces: 1 x component video / RGB input - 15 pin HD D-Sub (HD-15) ¦ 1 x composite video input - RCA ¦ 1 x HDMI - 19 pin HDMI Type A ¦ 1 x USB - 4 pin USB Type A ¦ 1 x USB - mini-USB Type B ¦ 1 x audio line-out - mini-phone stereo 3.5 mm ¦ 1 x audio line-in - mini-phone stereo 3.5 mm
Miscellaneous Included Accessories: Carrying case, wireless remote control
Cables Included: 1 x VGA cable ¦ 1 x composite video cable
Security Features: Security lock slot (cable lock sold separately)
Compliant Standards: GS, FCC, ROSTEST
Power Power Device: Internal
Nominal Voltage: AC 120/230 V
Power Consumption Operational: 135 Watt
Power Consumption Stand by: 0.5 Watt
Dimensions & Weight Width: 9.1 in
Depth: 6.5 in
Height: 1.8 in
Weight: 2.9 lbs
Manufacturer Warranty Service & Support: 1 year warranty
Service & Support Details: Limited warranty - 1 year ¦ Limited warranty - lamp - 90 days
Environmental Parameters Min Operating Temperature: 41 °F
Max Operating Temperature: 104 °F
Sound Emission: 33 dBA
Sound Emission (Economic Mode): 29 dBA
VPN: MR.JG711.009
Product Reviews
I use it in my room with a projection size of 100'' to watch movies on a brown wall and the quality is very good. A bit noisy.One issue was that with the Black colour enhancer setting enabled, the projector did suffer from the issue of periodic signal dropouts, irrespective of the source. I hope a firmware update will fix the problem.I submitted the problem to Acer.