Features:  - Intemational advanced wireless chip and circuit design techniques, support all wireless devices.  - With FM function, can search radio station broadcast automatically.  - With Hi-Fi speaker, to make sure the clear and bright sound.  - Support Micro SD card and USB card, play MP3 format audio.  - The wireless working distance is 10 meters.  - It will close automatically after 30 mins if disconnect Wireless.  - With AUX line in, can directly connect the outside devices, for example, tablet PC/TV/cell phones.  - Support TWS.  - Support Solar panel.    Specifications:   Wireless: V5.0;  Support: L2CAP/A2DP/AVCTP, can receive AUDIO signal and control the AUDIO device;  Support HSP/HFP(Handsfree profile), with HANDS-FREE;  functions.  Working distance: 10M;  SNR: 290db;  Battery: 3.7V 1200mah;  Normal volume playing time: 3H;  Speaker driver: :52mm*2;  Speaker Power: 40/5W*2;  Frequency response: 120HZ-20KHZ;  Unit size: 190x70.4x70.4mm;  Unit weight: about 548G;  Charging: 5V/500MAH;  Charging time: 3-4H;  Solar panel power: 5.5v/0.9w;  Color: Green, Silver grey, Red, Black, Blue;    Package included:  1 x Solar charging Bluetooth speaker;  1 x USB Cable;  1 x AUX Cable;  1 x Manual