Please include the specifications of the order product when filling up your order. On the lower part portion of product image, then click "add note" to specify your prefer color, memory and specification.
(ex. Vivo V15, 128gb, 6gb RAM, Coral Red) (ex. BT HF PRO SY BT1607, Red) 
 
Product Features
* No Software or app required
* Works with most of the mobile phones with USB OTG support
* Will draw power from the device you plug it in
* Not recommended as subtitute to your home light bulb or the like