The glove uses a MaxBotix MB7066 sonar sensor, three small motors, and an Arduino Pro Mini, and is programmed to send signals to the three middle fingers in silicone thimbles. The motors are placed on top of the index, middle, and ring fingers, and pump water from the surrounding environment. This water is siphoned onto the wearer’s fingertips to create pressure feedback. The thumb and pinky are left free in order to reduce clunkiness, save battery power, and improve movement. A silicone ring around the middle finger, connected to the sensor at the wrist by a small tube encasing the sensor’s wires, keeps the sensor parallel with the hand and allows it to read information from the direction the palm is facing. The sensor can receive and send signals from up to 2 feet of distance underwater, though Chacin says in the future it’d be possible to expand this range.