Check out the best Amazon deals of the day as of Sept. 23:

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OUR TOP PICK Ultimate Ears Boom 4 Bluetooth speaker $117.85 at Amazon (save $32.14)

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BEST BLUETOOTH TRACKER DEAL Tile Starter Pack $38.56 at Amazon (save $16.43)

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BEST SMART HOME DEAL Philips 4000 Series Smart Lock $117.20 at Amazon (save $52.79 with on-page coupon)

Amazon's Prime Big Deal Days is only two weeks away and the deals are slowly trickling in. We're keeping an eye out for all the best deals leading up to the shopping event — particularly on top brands we know and love. We've handpicked a few discounts we think are worth adding to your cart on Sept. 23, so you can kick off the savings a little bit early.

Here are our top picks for the best Amazon deals of the day. If none of these catch your eye, be sure to check back throughout the week as we select new deals each day.

Our top pick

Opens in a new window Credit: Ultimate Ears Ultimate Ears Boom 4 Bluetooth speaker $117.85 at Amazon
$149.99 Save $32.14

Mashable's Alex Perry called the Ultimate Ears Boom 3 "a powerful music tube with a bevy of customization options, excellent sound, and an all-day battery." Now, released just a few months ago, the Boom 4 is improving on the already great speaker with enhanced deep bass radiators for bigger sound, a new software trick called megaphone, and the coveted USB-C port. It's regularly $149.99, but as of Sept. 23, it's down to just $117.85 at Amazon. That's 21% in savings and the first time it's hit this low of a price. There's just one catch: the record-low price only applies to the black colorway.

Opens in a new window Credit: Tile Tile Starter Pack (Tile Mate + Tile Slim) $38.56 at Amazon
$54.99 Save $16.43

Tile's starter pack is a solid introduction to Bluetooth tracking devices. It includes one Tile Mate (one of our top picks for a Bluetooth tracker) and one Tile Slim for just $38.56. That's 30% cheaper than buying each one separately. The Tile Mate attaches to your keys, luggage, and more without much bulk, while the Slim is the shape of a credit card, so it can slip inside your wallet or purse. The pair are designed to reliably help you keep track of your stuff through GPS. Plus, you can opt into a paid Tile Premium subscription and unlock extra features, like notifications when you leave stuff behind and item reimbursement.

Opens in a new window Credit: Philips Philips 4000 Series Smart Lock $117.20 at Amazon
$169.99 Save $52.79 with on-page coupon

The Philips 4000 Series Smart Lock is on sale for just $117.20 at Amazon and serves as a great way to dabble in the smart home world without breaking the bank. It's usually $169.99, so you'll save about 31%. Just remember to check the box for the on-page coupon. We haven't had a chance to test the Philips smart lock, but our friends at PCMag (also owned by Ziff Davis) have and found it to be a sleek and effective device, but a bit expensive. Like any good smart lock, it gives you multiple ways to lock and unlock your door, including a fingerprint scan, PIN codes, a mobile app, and traditional keys. You'll need to purchase the WiFi bridge separately for remote access and voice control. But luckily, with this discount, you'll keep an extra $52.79 in your pocket. That's more than enough to pay for the WiFi bridge.

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Related Stories

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• The 5 best Bluetooth trackers for travel and lost luggage
• The best Bluetooth speakers, tested for sound, portability, and cool factor
• Here's why a smart lock should be the first smart home device you own
• The best home security systems
• The best home security cameras for privacy and peace of mind

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Topics Amazon Gadgets