ViewSonic X104K 4K UHD Short Throw Portable Smart LED Projector (X104K) - Brightness: 2400 (LED Lumens), Contrast Ratio: 3000000:1, Resolution: 3840x2160, Connectivity: Input: HDMI: 2 , (HDMI 2.0, HDCP 1.4/2.2), USB Type C: 1 (5V/ 2A), Audio-in (3.5mm): 1, Audio-in (Bluetooth): 1 (BT4.0), USB Type A: 3, (USB3.0 Reader x 1, USB2.0 Reader x 1, Wifi dongle x 1), SD Card: Micro SD (64GB, SDXC), RJ45 Input (Internet): 1, Wifi Input: 1 (5Gn), Output: Audio out (3.5mm): 1, Audio-out (Bluetooth): 1 (BT4.0), S/PDIF: 1, Speaker: 8W Cube x 2, USB Type A (Power): 2 , (USB3.0 - 5V/2A x 1, USB2.0 - 5V/1.5A x 1, share with USB A Input)