Hotfuleco Artisan PH-BT2020 Portable Bluetooth Speakers. Incredible Sound with 8 Hour Battery (Green) 1. Brand: Hotfuleco. Color: mainly red. Material: durable flame-resistant hard plastic and soft rubber. 2. Input: DC 12-24V. Output: DC 5V, 2.1A (1A for each one). 3. Matched with your own USB charging cable, it can be used to charge your iPad, iPhone, Samsung, car GPS, Bluetooth headset, car MP3 player, and any other devices that requires 5V USB power. 4. 2.1A output current allows it to rapidly charge 2 cellphones simultaneously or one tablet PC. 5. Built-in short circuit, high-current and overload protection design, for safe to use.