Home » Gadgets » Clearon Electric Bluetooth Backpack Speaker Gadgets Clearon Electric Bluetooth Backpack Speaker April 10, 2020 Advanced audio processing technology with the latest EDR and Bluetooth 3.0 to ensure high fidelity of transmissionButton rotary switch to easily control the volume and switchBuilt in 5000mah Power bank charger with cables accessible for android / iphone devicesAnti Deform, Waterproof and Anti clash surfaced material for overall protectionBring It Everywhere! Good for the beach, picnics, camping, parties, raves, festivals or school. GREAT for every ocassion