1. Touch buttons, easy to operate and easy to carry. 2. Bluetooth connection, the transmission distance can reach 10m. 3. Built-in microphone, support hands-free calling. 4. Support 32GB TF card music playback, plug and play (TF card is not included). 5. Support 3.5mm AUX audio function. 6. Support the voice broadcast function of payment collection. 7. Charging time: 3-5 hours. 8. Working voltage: 3.7V. 9. Playing time: about 10 hours (normal volume). 10. Battery capacity: 1000mA lithium-ion battery. 11. Dimensions: 85x85x30mm. 12. Charging voltage: USB 5V 600mA.

http://olla.gr/a8-portable-stereo-bluetooth-speaker-built-in-mic-support-hands-free-calls-tf-card-aux-in-red/