The KOLAV-M839
Key Features
Audio Unit: Equipped with an 8-inch driver unit for clear sound and deep bass.
Power & Battery: Powered by a built-in 7.4V 4000mAh rechargeable battery.
Connectivity: Supports USB, TF (MicroSD) cards, FM radio, Bluetooth, and TWS (True Wireless Stereo) pairing.
Design: Built as a private-model portable speaker, often styled with a convenient carrying handle.