UR31 Outdoor Sport Waterproof Power Bank Wireless Bluetooth Speaker with Bicycle Holder<br>Specification: <br>Model: UR31Bluetooth version: V2.1+EDRBluetooth protocol: A2DP， AVRCPTransmission distance: 10 metersPower bank capacity: 4000mAhInput voltage: 5V-1A(MAX)Output voltage: 5V-1A(MAX)Color: Black， Blue， Pink<br>Package Included: <br>1 x UR31 Sport Waterproof Bluetooth Speaker1 x 3.5mm AUX Cable1 x USB Cable1 x Bicycle Holder1 x User Manual