This is a ViewSonic M1+G2 LED mobile projector. I bought it because it's appealing that it can operate for about 6 hours on a single charge, but I'm selling it because I don't use it often. ◆ It has been used about 3 or 4 times. The cumulative usage time of the light source is 6 hours (can be checked in the settings). I have confirmed its operation and initialized it to the factory default settings. There are almost no scratches or stains, but please refrain from purchasing if you are concerned about minor imperfections. ◆ It comes with a remote control, box, instruction manual, case, cable, AC adapter, and USB-C cable. The box has traces of adhesive stickers, so please consider it as a bonus. ◆ The rubber cover that covers the connection terminals on the main unit has come off, and the cover separates from the main unit when opened (see photo). ◆ Sound Quality: Harman Kardon Bluetooth dual speakers Built-in Battery: Up to 6 hours Resolution: 854x480 Brightness: 300 LED lumens; 125 ANSI lumens Contrast Ratio: 120000:1 Color Reproduction: 1.07 billion colors Light Source Type: LED Light Source Life: Approximately 30,000 hours (normal mode) Light Source: RGB LED Projection Lens: F=1.7, f=5.5mm Offset: 100%+/-5% Throw Ratio: 1.2 Optical Zoom: Fixed Image Size: 24 inches - 100 inches Projection Distance: 0.64m-2.66m, (40 inches: approx. 1.06m) Keystone Correction: +/- 40° (Vertical) Noise Level (Standard): 26dB Noise Level (Eco): 25dB Storage Capacity: Total 16GB, (12GB available) Supported Resolutions: VGA (640 x 480) - FullHD (1920 x 1080), *Output resolution is WVGA Scanning Frequency (Horizontal): 15K-102KHz Maximum Brightness...Less than 1500 lumens