The EarFun UBOOM X is EarFun’s big boombox-style speaker: 80W of output from two 4-inch woofers and two 20 mm tweeters, LED lights that react to the music, an IP67 rating and up to 30 hours of playtime. It is the kind of speaker people unbox, pair in ten seconds and never configure, which leaves a lot of its features unused. This guide follows the official EarFun product page and walks through the setup in the order that actually makes sense, from the first charge to the first outdoor party.
Disclosure: this guide contains affiliate links (Awin). If you buy through them we may earn a commission at no extra cost to you. Specs come from the official product page.
What you need
- The EarFun UBOOM X with its USB-C cable, carry handle and detachable strap
- A USB-C charger, ideally a 30W one (the speaker accepts up to 20V/3A input)
- A phone with Bluetooth and the free EarFun Audio app (Google Play or App Store)
- Optional: a 3.5 mm audio cable for the AUX-IN port
- Optional: a second EarFun speaker that supports Party Connect
Step 1: Give it a full first charge
Plug the speaker into a USB-C charger before the first party. EarFun rates the battery for up to 30 hours of playtime, and the product page quotes about 4 hours for a full charge with 30W fast charging (the spec sheet says under 6 hours, depending on the adapter). If you are in a hurry, the quick charge claim is roughly 10 minutes of charging for up to 3 hours of music. Real playtime drops when you play loud and keep the lights on, which is normal for any party speaker.
Step 2: Switch it on and pair your phone
Turn the speaker on and open the Bluetooth menu on your phone. The UBOOM X uses Bluetooth 5.3 with a range of up to 15 m (about 49 ft) in open space, which is enough to keep the phone in your pocket while you move around the garden. Walls and bodies shorten that range, so keep the phone in the same room for the most stable connection. If you have a laptop or an old MP3 player without Bluetooth, the AUX-IN port takes a standard audio cable.
Step 3: Pick an EQ and light mode in the EarFun Audio app
Install EarFun Audio and connect the speaker. This is where the UBOOM X gets interesting: the preset EQs were tuned with Oluv, a well-known speaker reviewer. You get BOOM, Outdoor+, Outdoor, Indoor+, Indoor and Studio presets, plus a custom EQ if you want to shape the sound yourself. Indoor presets keep the bass under control in a small room, Outdoor presets push it harder when there are no walls to help. The same app controls the multi-color LED lights that sync with the music, and you can switch them off to save battery.
Step 4: Link more speakers with Party Connect
One speaker is plenty for a living room, but for a garden or a big room you can chain more. EarFun Party Connect links up to 50 compatible speakers that all play the same song. Pair your phone with the first speaker, then add the others as described in the app and the manual. Spread them out instead of stacking them, so the sound covers the whole space rather than getting louder in one spot.
Step 5: Take it outdoors
The UBOOM X is rated IP67 for dust and water, it floats, and EarFun describes it as rustproof with a sweat-resistant coating. That covers a pool party, a beach or a sudden rain shower. The rugged handle and the detachable shoulder strap make the 4.15 kg body easier to carry. And if a phone is running low, the speaker doubles as a power bank with a 5V/2A output, so it can top up your phone while the music keeps playing.
Pro tip
Charge the speaker fully before you head out and turn the LED lights off when you do not need them. Lights, high volume and power bank use all pull from the same battery, and the 30-hour figure is a best case. A short top-up with a 30W charger before you leave makes a bigger difference than any setting.
Ready to go: once the battery is full, the phone is paired and your favourite EQ preset is saved, the UBOOM X is a grab-and-go speaker. Clip on the strap, choose an Outdoor preset and you are set for the day.
EarFun UBOOM X Portable Party Speaker (Black)
80W portable party speaker with two 4″ woofers and two 20 mm tweeters, Bluetooth 5.3 (up to 15 m), music-synced LED lights, EQ presets tuned by Oluv in the EarFun Audio app, Party Connect for up to 50 speakers, IP67 waterproof and floatable, up to 30 hours of playtime, 30W USB-C fast charging, power bank output, AUX-IN, built-in mic and an 18-month warranty. 400 x 150 x 217 mm, 4.15 kg. On the official EarFun store in October 2026 it is listed at $159.99 (list price $189.99). Prices change, so check before you buy.
FAQ
Is the EarFun UBOOM X waterproof?
Yes. EarFun rates it IP67 for dust and water, and it floats. Let it dry before charging through the USB-C port.
How long does the battery last?
Up to 30 hours according to EarFun. Volume, LED lights and power bank use shorten the real figure.
Can I connect two UBOOM X speakers?
Yes. Party Connect links up to 50 compatible EarFun speakers that play the same audio.
Does it work without the app?
Yes. Bluetooth pairing and playback work without it. The app adds the EQ presets, the custom EQ and the light controls.
