The Clean Stream is a Pre-Mixed Clean Synthetic Urine Kit. The Clean Stream's Synthetic Vinyl Bladder Belt is gravity operated. The urine is easily delivered by releasing the two clips that retain the urine in the bladder bag. Once the clips are released a toxin free urine sample flows through rubber tube that is part of a light weight bladder belt. The bladder belt wraps around your waist and is worn under your clothing. The Synthetic Urine Vinyl Bladder Belt comes completely assembled. All these features add up to a simple to use, discreet and clean product.