Xiankeli Rechargeable S11 Bluetooth Speaker Mini Stereo Speaker with TF Card Slot for iPhone iPad Android Cellphone Tablet PC Mp3 (blue) Bluetooth protocol: version 2.1+EDR Easy to use and very portable, awesome little speaker, perfect for listing to mucic, movies. Working Distance: 40m; Support A2DP,AVRCP,headset,handfree profile 6. Support Hands free with Noise cancellation and echo suppression Support Bluetooth-enabled device: smartphone/ Laptop/ Tablet pc/ /PSP/ MP3/ MP4 Charging time: about 2 hours. Power supply: USB Power