PRODUCT DETAILS OF ACER RELEASES C250I PORTABLE LED PROJECTOR SPECIFICATIONS : Projection System : DLP Light Source : LED Resolution: Native:Full HD (1920 x 1080) Brightness: 300 Lumens (Standard) Aspect Ratio: 16"9 (Native), 4:3 (Supported) Contrast Ratio: 5,000 : 1 Throw Raio: 1.2 (75"@2m) Lamp Life: 20,000 Hours (Standard), 30,000 Hours (ECO) Battery: Li-ion Rechargeable (3.33V, 9000mAh) Projection Lens: F=1.60, f=5.02mm, Manual Focus Noise Level: 29dBA (Bright), 25 dBA (ECO) Input Interface: HDMI(Video, Audio, HDCP) x 1 USB (Type A, 5V/0.5A, FW Upgrade) x1 USB x 1(Type C,Display & Change) SD (Micro, SDHC) x1 Output Interface: PC Audio (Stereo Mini Jack) x1,DC Out(5V/0.5A, USB Type A) X2 Feature Highlights: Remarkable Portability -World 1st Auto portrait for mobil -Stand-free Any Angle Projector -Perfectly Sized & light Weight -Embedded Battery 9,000 mAh dcas power bank -Built-in Bluetooth 5W Speaker -Acer True Harmony Superior Lightning -LED light source -Wide Color Gamut -13% Rec 7 -Full HD (1920 x 1080 resolution) -300 Lumen Brightness -5,000: 1 Contrast ratio -Instant On/Off Hassle-free Projection -Built-in Wireless Projection via Android or iOS device -Mobile USB display (charging sm Device simultaneously) -PC USB Display -USB Type-C Display and Charge (Charging Smart Device Simultaneously) -Multimedia playbak -Horizontal & Vertical Keystone -4-Corner Correction Eco-Friendly Functionality -Up to 30000 Hours lifespan (Eco-Mode)