Certification:NONE
Origin:CN(Origin)
Bluetooth standard:2.1
working frequency:2480
30pin Bluetooth audio receiver, six colors optional (all black, all white, white plus black, white plus gray, white plus blue, white plus green), the default white plus black color (main picture 1), other colors are required Please note for the order. If you do not note, the default color is white and black. Therefore, our company will not bear the return cost.