Product:TG-179 Multi-function Bluetooth Speaker Wireless Portable Creative Audio Speaker Features: 1:Bluetooth 4.2 technology offers efficient and stable transmission,easy to use indoors or outdoors. 2:Light and compact, and can fit easily into your bag. Suitable for outdoor use. 3:Built-in lithium battery brings 6 hours of dual channel playback. 4:Support USB flash disk,TF storage card,AUX. 5:Support TWS: Two speakers can be connected at the same time to achieve higher power.