Ultimate Ears WONDERBOOM 4 Portable Bluetooth Speaker – Blue (984-001877)

The Ultimate Ears WONDERBOOM 4 packs surprisingly big 360° sound with punchy bass into a rugged, ultra-portable package built for the outdoors. It's waterproof, dustproof, drop-proof, and even floats so you can take it to the pool, beach, trail, or shower without worry. Tap Outdoor Boost for audio tuned for open-air environments, or switch to Podcast Mode for rich, clear vocals. With 14 hours of battery life and true wireless stereo pairing with a second WONDERBOOM 4, the fun doesn't stop.

Key Features

360° Sound with Punchy Bass: Two 1.57" (40mm) active drivers and two 1.81 x 2.57" passive radiators project balanced, immersive sound in every direction.
Outdoor Boost: One-tap EQ mode specially tuned to cut through outdoor ambient noise for louder, more powerful playback in open environments.
Podcast Mode: New dedicated EQ mode designed for crisp, clear vocal reproduction — perfect for podcasts, audiobooks, and voice content.
IP67 Waterproof, Dustproof & Floatable: Fully dustproof and submersible in up to 1 meter of water for 30 minutes. It even floats — ideal for pool and beach use.
Drop-Proof from 5 feet (1.5m): Drop-tested to withstand everyday accidents on trails, patios, and beyond.
14 Hours of Battery Life: Rechargeable lithium-ion battery via USB-C — lasts all day through any adventure.
Double Up for Stereo: Pair two WONDERBOOM 4 speakers for double the sound, or press again for true left-right wireless stereo channels.
131 ft (40m) Bluetooth Range: Extended wireless range for freedom of movement.
Google Fast Pair: One-tap effortless pairing with Android devices (Android 6.0+).

In the Box

Ultimate Ears WONDERBOOM 4 Speaker (Blue)
Bungee Loop (Attached)
USB-C Charging Cable

UPC: 097855189950

MPN: 984-001877

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Ultimate Ears WONDERBOOM 4 Portable Bluetooth Speaker - Blue