T&G T505 Portable Mini Bluetooth Speaker - BLACK Battery type:1200 mah Lithium-ion Polymer 4~6 hours of playtime (varies by volume level and content) Take crystal clear calls from your HIFI speaker Unique and fashionable style Portable design with hanging strip, perfect for outdoor, indoor, travel Support FM Function, this speaker can help you to search the radio station Support Micro SD Card, this Bluetooth speaker is not only a Bluetooth speaker but also an MP3 Player With AUX Cable, this speaker can be connected with TV, Computer, Laptops, Tablets, all kinds of Cell Phones which have 3.5mm Audio Port Built Intelligent Energy Saving System, this Bluetooth Speaker will turn off automatically Bluetooth wirelessly connects your smartphone or tablet to the Bluetooth speaker and take turns playing a powerful stereo sound.