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:
Bluetooth Version: 4.2
Function:Bluetooth/USB/TF Card/3.5mm line in/FM Radio/Alarm clock
Battery: 1500mAh
Play Time: 5-8hours ( 50pct volume ),the max volum  3-4hours
Standby Time: 180 hours
Channel: 2
TF Card Extension: 32G to MAX. ( Not included )
USB Disk Extension: 32G to MAX. ( Not included )
Transmit Distance: 10m
Output Power: 5W x 2
Charging Time: 6 hours
SNR: 75dB
Distortion: Less than 0.1pct
Frequency Response: 20Hz - 20KHz
Support Profile: A2DP, AVRCP, HSP, HFP
Frequency Range: 2.4GHz - 2.48GHz
Material: Wooden