Portable Mini Wireless Bluetooth Speaker for Smartphone Tablet, Voice Prompt, Microphone for Hands Free CALL, Rechargeable Battery -- Black Ultra Compact and portable Bluetooth speaker, less than 0.3lbs, the size is only 2.3*2.3*2inches, you could take it anywhere, very convenience and easy to carry on your pocket, back or backpack for home, car, traveling... Supports any device that comes with Bluetooth function, such as iPhone, iPad, Samsung Galaxy/Note/tablet, Laptop, Tablet/PC, etc. Supports any device that comes with Bluetooth function, such as iPhone, iPad, Samsung Galaxy/Note/tablet, Laptop, Tablet/PC, etc. Built-in 520mAh rechargeable Li-ion battery, provides more than 4 hours playing time with one single charge, and it supports charging via USB interface through your power bank, computer, laptop, etc. Energy Saving design, the speaker will automatic shutdown if no operation for 10 minutes.