Touchjet TP80WUS Pond Smart Touch Projector Portable Design - Weighs 9.6 ounces. Easy for transport. Multi-Touch - Up to 4 people can interact with the surface at the same time. Built-in Wifi - Along with a Bluetooth interface, allows simple connectivity to all your devices. Auto-Calibration - Touch layers are synchronized even if you move the projection. Resolution - Up to 80 lumens of white brightness at 854 x 480 resolution. Built-In Speaker - Offers crisp audio with headphone jack for more speakers. Remote App Control - Touchscreen when you want, remote so you can control from your smarphone. Use Touchjet App (iOS and Android) on your smartphone as a remote control.