Bluetooth V3.0 and 2.1 + EDR and Bluetooth 2.0 1.2 1.1; Hi-Fi stereo output; Enjoy stereo music by connecting iPone / iPad / iPod to speakers with 3.5mm AUX IN or LINE IN port; Hands-free; Bluetooth chip can reduce noise; Multi-functional mini size and easy to use; With LED indicators showing the charging / full power / out of power status; Compatible with iPhone / iPad / iPod and other smart phones with bluetooth; Five languages for option: English Chinese Spanish French German; With energy saving function: this product will turn off automatically after bluetooth is turned off for 15 minutes; Shutdown current: <= 3uA; Battery standby time can last for more than 1 year when this product is turned off; Low power comsuption; More than 150 hours of standby time when it is fully charged.