This is the XGIMI Halo+ mobile projector. Compared to the standard XGIMI Halo, the XGIMI Halo+ projects a brighter image and has improved sound quality ^ ^ As long as you have Wi-Fi, you can project videos from YouTube and video apps. It has built-in speakers for comfortable use ^ ^ ■ "Auto Focus / XGIMI's Unique 4 Auto-Adjustment Functions" The Halo+ almost eliminates the stress of screen correction with its barely noticeable auto-focus, vertical and horizontal automatic keystone correction, automatic screen adjustment, and automatic obstacle avoidance. ■ "Built-in Large Capacity Battery" This mobile projector with a built-in battery is portable, and with this single unit, you can easily transform your usual space into a special one. ■ "Equipped with Harman/Kardon 5W x 2 Speakers" Enjoy powerful and rich audio. Movies, games, and music are vividly expressed with surprisingly clear and deep sound. Manufacturer XGIMI Halo+ Model WM03A Display Resolution 1920 x 1080 Maximum Display Resolution 1920 x 1080 Size 145 × 113.5 × 171.5mm Weight 1.6kg RAM 2GB Storage 16GB Projection Size 30~300 inches or more Condition There are some minor scratches due to use and storage, but operation has been confirmed and it can be used without any problems. No dead pixels, auto-focus is normal. It has been stored at home with little use. Total projection time is less than 80 hours. XGIMI Halo W M03A (DLP method, 800lm Full HD) Brand: XGIMI Projector Features: Portable, Pico Projection Method: DLP Brightness, Luminous Flux (lm): 800.0 lm Resolution: FullHD (1920 x 1080) Video Terminals: HDMI terminal, USB Projector Functions: HDR, Distortion Correction, Keystone Correction, Built-in Battery, Wi-Fi, Bluetooth, Speaker Equipped, 3D Compatible Smart TV OS: Android TV OS Weight (kg): 0.9 kg XGIMI Halo+ Projector Brand: XGIMI