14-HOUR BATTERY

Rechargeable lithium-ion battery for up to 14 hours of battery life between USB-C charges.

BEATS DUST, SPLASHES, AND FLOATS

With its IP67 rating, it holds up against dust, dirt, big splashes—and it even floats in water.

*Drop-tested from 1 m.

OUTDOOR & PODCAST MODE

Check out the new EQ mode specially designed for crisp, clear vocals, so podcasts sound great.

SURPRISINGLY BIGGER 360 SOUND

Get that big, bassy stereo sound—all from one little speaker. Tap the Outdoor Boost for audio that’s specially tuned for the great outdoors.

DOUBLE UP FOR SERIOUS STEREO

All you gotta do is pair up two. Press once to double up. Press again for a full two-channel stereo assault—that’s left and right channels blasting from each respective speaker.

(Doesn’t connect with WONDERBOOM 1,2, BOOM, MEGABOOM, or HYPERBOOM)

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SPECS & DETAILS

Rechargeable lithium-ion battery for up to 14 hours of battery life between type-c USB charges.

Maximum sound level: 86 dBC (normal) and 87dBC (outdoor)

Drivers: two 1.57 in (40 mm) active drivers and two 1.81 x 2.57 in (46.1 x 65.2 mm) passive radiators

131 feet (40 meter) range (Actual Bluetooth range will vary depending on the use, setting, environmental conditions and number of connected devices).

Connect up to two source devices at the same time.

Wirelessly play (stream) to 2 WONDERBOOM 4 speakers from one source

For audio playback: smartphones, tablets and other devices that support Bluetooth [Advanced Audio Distribution Profile (A2DP)]

Height: 4.09 in (104 mm)
Width: 0.31 ft (95.3 mm)
Weight: 14.81 oz (420 g) (speaker only)

2-Year Limited Hardware Warranty

ULTIMATE EARS WONDERBOOM 4
Bungee (attached to product)
USB Cable
Quick Start Guide ( printed inside the box)