The MK-301 is a headphone speaker with a focus on style and portability. It features a 3.5mm audio jack, USB interface, and supports TF card playback. It also has a built-in lithium battery, a radio function, and can be adjusted using buttons. 
Key Specs:
Power Supply: USB, built-in lithium battery.
Connectivity: 3.5mm audio jack, Bluetooth 5.0.
Audio: Supports MP3 playback, 2.1 channel, SNR ≥70db.
Other Features: Radio function, TF card support, button controls.
Design: "Big Pea" stylish design, plastic cabinet and shell.
Dimensions: (Based on similar products) 33.1 x 9.5 cm.
Weight: 0.35kg.
Time to Market: 2020. 
Additional Details:
The MK-301 is described as a "Big Pea" styled headphone speaker, suggesting a unique design. 
It can be connected via a 3.5mm audio jack or wirelessly via Bluetooth. 
It includes a built-in lithium battery for portable use. 
The speaker features a radio function and supports TF card playback for various audio options. 
It is designed with button controls for adjustments and mode selection. 
It is a lightweight and portable speaker, weighing only 0.35kg. 
The speaker has a 2.1 channel configuration and a signal-to-noise ratio of ≥70db, indicating good audio quality.