Title:None,Content:• Battery powered 3W power amplifier for guitar.
• High-sensitivity, clear and clean sound, excellent music enjoyment. 
• Mini size for easy and convenient for jamming along or listening music. 
• With headphone jack, instrument input jack, volume & tone control. Also with overdrive.
• Powered by 9V battery. 
Specifications: 
• Material: Plastic 
• Color: Black
• Output: 3W 
To order contact us on 08073644553/08141671757 call/whatsapp

Nice thing. But I'd say that to get a nice electric guitar sound, you need a 1x12 cab at least. Or something like Yamaha THR. And if you don't want to spend so much money on an amp, acoustic guitar is the only option. There are some really good models that aren't really expensive. Something like https://musiety.com/fender-fa-100-review-the-budget-classics/ for example.

How much is it, how long does it last, how loud does it get, and what are the physical dimensions?

I think that for guitars, the distortion of a cheap single-ended fender tube amp defined the sound of the electric guitar. So the reasons for preferring a tube amp for guitars would not be the reasons for preferring tube amps for general music.