The Select Upgrade includes;br br AquaSound - state-of-the-art built-in Bluetooth speakers that are integrated into the body of your spa.br br AquaGlow Backlit Jets - an enhanced lighting feature, which further illuminates the water of your spa.br br An Additional Mini touchpad - giving you greater control when relaxing in your spa.br br And, UV Sanitisation - which uses targeted light to provide an extra level of spa cleanliness.