Earfun Uboom Slim Review: Ranked #44 of 164

Last updated: October 5, 2026

The Earfun Uboom Slim ranks #44 out of 164 total Medium Size Portable Bluetooth Speakers for sound quality. See all Portable Bluetooth rankings for every top pick.

Brand: EarFun

Prices on this page were last checked October 5, 2026 at 10:21 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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Earfun Uboom Slim - ranked #44 of 164 Medium Size Portable Bluetooth Speakers · Editor's rating 3.7/5

#44 Earfun Uboom Slim: $79 eBay

Pros: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability. Measured bass extension of ~63Hz (-10dB).

Cons: Not as deep bass as others. Warm tuned, peaks in the mids and lower treble, rolled off upper treble

How it compares: Just above it: JBL Charge Essential 3 SE - $121 more, 4 more hours of battery life. Just below it: Soundcore Motion 100 - $32 cheaper, 4 fewer hours of battery life.

Amplifier Power20W
AppNo
Aux InputYes
Bass Extension (-10dB)~63Hz
Battery Life16 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC
Bluetooth Version5.2
Built-in MicrophoneYes
Digital Aux InputNo
Dimensions2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm)
Drivers45mm speaker drivers
EQNo
IP RatingIPX7
OmnidirectionalNo
Power InputUSB-C
StereoYes
TWSYes
Weight1.2 lbs (560 g)
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