SMALL AND COMPACT: This mini projector is only 12.6 x 8.5 x 4.7 cm, almost as big as yours, ONLY IDEAL FOR HOME ENTERTAINMENT IN DARK CONDITIONS, NOT recommended for PowerPoint or Business presentations. With built-in speaker, but does not support Bluetooth.POWERED BY EXTERNAL BATTERY: The mini overhead projector does not have a built-in battery, but requires a 5V/2A power source such as a wall charger or power bank. Ideal for traveling, hiking and camping without electricity or TV. It is also very popular with children.COMPATIBLE WITH MULTIPLE DEVICES: ARC/USB/AV/SD slots allow this mini projector to work with smartphones, laptops, tablets, DVD players, Switch/PS4/XBOX, Fire TV Stick, Chromecast, USB flash drive, Connect Mirco SD, audio devices and more.IMAGE PERFORMANCE: : 800 lumens; Native resolution: 480*320 pixels; Maximum supported resolution: 1080P; Aspect ratio: 4:3 or 16:9; Projection distance: 1-3m; Projection size: up to 60 inches. NOTE: May not be compatible with Dolby video sound! Ideal for beginners, not for professional users!CONNECTION: To connect to your smartphone, tablets or laptop, you may need a Lighting to ARC cable, Micro USB to ARC or Type-C to ARC depending on your devices. If you want to connect it to WiFi, a WiFi dongle is required (NOT INCLUDED).