WaterProof Sport bluetooth speaker with Carabiner, features in small size, waterproof , FM Function, TF card and a Carabiner. The carabiner can help free your hands by hook the speaker on the keychain, or the backpack, make it easy to enjoy music when you do sports like hiking, camping, cycling or more outdoor events. Samll size and lightweight would not bring burden to your package; Powered by 450 mAh battery. Bluetooth 3.O+EDR, allow a 30 feet or more Bluetooth connection distance. The sports bluetooth speake is a multifunction players, can be a good companion during your journey. With LOGO imprint on, it;s also a great item for sale meeting, trade shows, etc.