Please include the specifications of the 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 other specification.
(ex. Vivo V15, 128gb, 6gb RAM, Coral Red) (ex. BT HF PRO SY BT1607, Red) 
Model: K52B 
SERIAL: WIRELESS
MULTIMEDIA BLUETOOTH SPEAKER
BUILT IN LION BATTERY: 7:4V 2000mAh
DIGITAL DISPLAY WINDOW
ECHO VOLUME KNOB
OWER SWITCH
CHARGE LED: WHEN CHARGING, THE LIGHT IS RED
DC INPUT PORT
MICROPHONE INPUT PORT
LINE IN INPUT PORT
MICROPHONE VOLUME KNOB
TREBLE VOLUME
USB INTERFACE: INSERT USB
F CARD INTERFACE: INSTER TF CARD
VOLUME KNOB
PRE/NEXT: WHEN YOU PLAY THE USB AND TF CARD
PLAY/PAUSE: WHEN PLAY USB AND TF CARD
MIC RST BUTTON
RECORD/PLAY: SHORT PRESS TO ENTER RECORD STATE
MODE: AUX INPUT, BLUETOOTH, USB, TF CARD, FM RADIO, CHANGING OVER
LED SWITCH: SHORT PRESS IT SHOWS 0, LONG PRESS SHOWS DIFFERENT STYLE OF LED 
NUMBER BUTTON: CHOOSE THE MUSIC QUICKLY