Abstract: A system, which is optionally a virtual reality (VR) system, including: (a) a finger-wearable device that has a force sensing actuator configured to sense a pinching of thumb to finger and trigger an emission of a signal, multiple light sources configured to emit multiple optical signals, a motion detector, and a radio frequency (RF) transmitter configured to transmit an RF signal; (b) a screen; (c) an RF receiver configured to receive the RF signal; (d) at least one optical sensor configured to receive the multiple optical signals and use the optical signals to detect a spatial position of the finger-wearable device; and (d) a controller configured to use the received RF signal, the multiple optical signals and the spatial position to project visual content onto the screen.