Specification:Material: Waterproof nylonCapacity: 3LWaistline: 128cmWaist Bag Size: 40 x 9cm(LxH)Bottle Pouch Size: 6 x 5.5 x 20cm(LxWxH)Color: Green, Blue, Black, Red, Orange, FlowerWeight: About 350gFunction: Oudoor sports, Enjoy musicFeatures:More fits to cell phone size within 6 inch.3 zipper bags, front bag, main bag, and back bag.Dismountable water bottle pouch, more convenient to use.Built-in soundbox in two sides, audio power amplifier, can enjoy music during sports.Package Included:1 x Sports Marathon Music Waist Bag1 x Audio Amplifier Case (Built-in Li battery)1 x Audio Output Cable1 x Audio Input Cable1 x USB Cable