VECOO Bicycle Bluetooth Speaker Case Bag with Hands-free Calls for iPhone 6 6S 7 Plus Samsung Huawei iPod MP3 Players Less than 5 inches, with 4000mAh Power Bank Charger (Red) This Speaker Has Exceptional Clarity of Sound and a Built-in Amplifier for a Surprisingly Loud Volume. Connect any MP3 player or phone via the Bluetooth or 3.5mm AUX cable, Answer phone calls using the speakers built in microphone and call answer Feature. Includes a 4,000mAh Rechargeable Power Battery Pack for up to 15 hours of continues play or charge mobile phones. Sturdy case stores your Sunglasses, phone or MP3 Device and protects it from shock and weather. Package contents: Portable Bluetooth Speaker*1Pc, micro USB cable*1Pc, 3.5mm audio cable*1Pc.