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) 
Features
* Usb Interface
* Micro Charging port
* Tf card slot
* With 3.5 mm line-in port
Specification
*  BT version: 4.2
* Transmission Distance: 10m
* Power Output: 3 W*2
* Frequency Response: 90HZ-20 Khz
* Distortion: <0.5%(At1.0kHZ 2W)
* Signal Noise Rate: 80dB
* USB voltage: DC5V
* Battery Capacity: 1200mah