It's not too big, the size is like the palm of a hand as seen in the photos. In the description it says the speaker is 5 w but it's actually 4 w, still sounds great and a volume level suitable for an average room. If you use it on the outside, it still sounds pretty good. The maximum volume battery lasts about 6 hour s and a half, i don't know the amperi time but i added an extra 1200 mah battery and it comes to 8 hour s at maximum volume and average volume 10 hour s (you need to weld it to the plate). As for the sound aúnque carries a passive membrane for bass is not a speaker that stands out in bass rather stands out on average frequencies, even the bass is present you don't get a good experience since equalizing to highlight the subwoofer you drown the others frequencies and still don't make much difference. It's a good speaker for almost 30 to go without concern is whether it breaks or something. I recommend it if you are going to use it to listen to pun your ally but if you want to enjoy a good quality audio and enjoy music.
Package arrived in about a little over a week. High quality speakers. Highly recommended for anyone who is looking for a good quality speaker that you can use outside for a low price.
The sound of this speaker is good, what I love about it is that even tough it is small it can deliver quite strong sounds. I use it every day for my showering and used on 2 dorm parties