Product specifications: 1. Wireless: V4.2 2. Support: L2CAP/A2DP(AVCTP/AVDTP/AVRCP), to receive stereo audio signal, can control the audio transmitter and up and down operation through the agreement; support HSP / HFP (Handsfree profile), with hands-free function, Can communicate with people. 3. distance:10M 4. SNR: 90db 5. Battery: 1200mAh 6. Built-in voltage: 3.7V 7. Normal volume playing time:2H 8. Speaker driver: ¢52mm*2 9. Power: 4 /5W *2 10. requency response:150HZ-20KHZ 11. Unit size:80*80mm*180mm 12. Carton meas: 13. Unit weight: 590g 14. Charging: 5V/500mA 15. Color: Red , Blue , Black , Green Product Feature: 1. International advanced Wireless audio decoder chip, support all wireless devices. 2. With FM function, can search radio station broadcast automatically 3. With Hi-Fi speaker, to make sure the clear and bright sound. 4. Support Micro SD card and USB card. 5. The wireless working distance is 10 meters. 6. With LINE IN slot, to provide you with computer speaker function. Can directly connect the outside devices, for example, tablet PC/TV/cell phones. Product Include: 1x Bluetooth Speaker 1x AUX Audio Cable 1x USB Power Cable NOTE: In the FM mode, put in micro charging cable to get better FM radio station.