The Theta Chime is handmade by SilverSky Imports. The inside of the chime features 8 silver rods that are 8 different tones that make up each of the 4 unique tunings. The rods are silver soldered into the metal base of the chime. A hard acrylic sphere hanging from the center rope strikes each rod in the perfect position. The chime is played by gently holding the rope at the top of the chime and lightly moving it in a circular motion. It can also be suspended by the rope and and hung outside to act as a windchime. The Theta Chime is suggested for outdoor use.