TUAW is going to be giving away a gaggle of ghoulishly good gadgets over the next few days. Be sure to come back every day between now and October 30th for a chance to win. The good part of the giveaways? You don't need to wear a costume to win 'em.

As part of this week's Trick or Treat with TUAW series, our first giveaway will be handy for blasting the Halloween visitors to your home with all sorts of spooky music. The iMainGo 2 mobile speakers (US$39.99) are lightweight, powerful music speakers that also serve as protection for your iPod or iPhone.

The speakers don't include a power plug or rechargeable batteries, but you will get upwards of 30 hours of musical enjoyment from four AAA batteries. To use the iMainGo 2 speakers, you just unzip the case, plug in your device using the standard 3.5 mm connector, zip it back up and keep your device protected from sun, sand, splashes, and spills while the tunes are blasting out. You can even connect the speakers to your iPad or MacBook for added musical fun.

iMainGo 2 features titanium high-output speakers, so it pumps out a surprising amount of sound. Be sure to take a look at some of the reviews on Amazon.com, which reiterate just how good the iMainGo 2 mobile speakers really are.

Now, for the giveaway. To enter, leave a comment telling us what you'll use the iMainGo 2 speakers for. It can be anything -- listening to tunes, blasting out the soundtrack for a movie you're watching, even using them with a headset and your Mac as a PA system. Here are the rules:

• Open to legal US residents of the 50 United States, the District of Columbia, and Canada (excluding Quebec) who are 18 and older.
• To enter, leave a comment telling us how you'll use the iMainGo 2 speakers.
• The comment must be left before midnight on Sunday, October 31st, 2010, 11:59PM Eastern Daylight Time.
• You may enter only once.
• One winner will be selected and receive an iMainGo 2 mobile speaker setup valued at $39.99.
• Click here for complete official rules.

Good luck!