The RealDoll SenseX insert is an electronic insert designed to pair via Bluetooth to the xMode App. The insert can detect touch and movement, and the xMode app will transmit audio feedback to any paired audio source. The app will simulate the gradual transition from mild arousal to orgasm, and has multiple voices to choose from. This system is also designed to work with Realdollx robotic heads as well, but you do not need the robot to enjoy this technology. You can use the RealDoll SenseX insert with any Realdoll equipped with removable inserts.