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) 
 
 
Bluetooth version BK 2.1 version
Stereo Sound Output: 10Wx2
BT frequency rang: 2.4GHz-2.48GHz
Operating Distance: up to 10M (free space)
Standyby time: 24hours
Playtime: 6hours
Charging Time: 5 hours
Internal Battery: 400mah Li-ion Battery.
Operation Temperature: 10 to 50 C
Dc output 5v 1.5 a
Charges connected device
Built-in handle for easy carrying 
Rugged desing ideal for outdoor activities
Long lasting built in battery
Supports 3.5mm jack for wired use
TF card Support