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Small cylindrical gray Bluetooth speaker with attached bungee loop

Logitech

Logitech 984-001879 Ultimate Ears WONDERBOOM 4 portable speaker Gray

SKU CH-9A5Y-PMBZ8 MPN 984-001879

A compact Bluetooth speaker delivering 360-degree sound with 14-hour battery life, IP67 waterproof and dustproof rating, and 131-foot wireless range

  • NameULTIMATE EARS WONDERBOOM™ 4 - Gray
  • ColorGray
  • Speaker TypeBluetooth Speaker
  • SpecificationAUDIO Maximum sound level: 86 dBC (normal) and 87dBC (outdoo
  • CompatibilityFor audio playback: smartphones, tablets and other devices t
  • ConnectivityUSB
  • 360° sound from two 40 mm drivers and passive radiators
  • 14 hours playback from rechargeable lithium-ion battery
  • IP67 waterproof, dustproof and floats for 30 minutes at 1 m
  • 131 ft Bluetooth range with outdoor and podcast EQ modes
  • Compact 104 mm height and 420 g weight with attached bungee loop

Portable Bluetooth Speaker Gray

The Ultimate Ears WONDERBOOM 4 is a compact wireless speaker built for listeners who want 360-degree sound in a rugged, waterproof package. It delivers up to 14 hours of playback on a single charge and reaches a maximum output of 86 dBC in normal mode or 87 dBC with Outdoor Boost engaged.

Simple Pairing Rugged Build

Pairing is a standard Bluetooth connection to any smartphone or tablet supporting A2DP; the speaker remembers the last device for quick reconnection. The IP67 rating means it survives immersion in one metre of water for 30 minutes, resists dust, and floats, so drops into a pool or sand are not fatal. A built-in bungee loop lets you hang it from a pack or shower caddy.

14-Hour Battery Decides Fit

The single figure that determines suitability is the 14-hour battery life between micro-USB charges. If your outings regularly exceed a full day without access to power, this speaker will fall short; for afternoon pool sessions, beach trips, or moving between rooms at home, the runtime matches the use case.

Highlights

  • 360° sound from two 40 mm drivers and passive radiators
  • 14 hours playback from rechargeable lithium-ion battery
  • IP67 waterproof, dustproof and floats for 30 minutes at 1 m
  • 131 ft Bluetooth range with outdoor and podcast EQ modes
  • Compact 104 mm height and 420 g weight with attached bungee loop

Specifications

BrandUltimate Ears
NameULTIMATE EARS WONDERBOOM™ 4 - Gray
Model984-001879
Part Number984-001879
ColorGray
Speaker TypeBluetooth Speaker
SpecificationAUDIO
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
WIRELESS CAPABILITIES
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
CompatibilityFor audio playback: smartphones, tablets and other devices that support Bluetooth [Advanced Audio Distribution Profile (A2DP)]
ConnectivityUSB
Wireless TechnologyBluetooth
Operating Range131 feet (40 meter) range
BatteryRechargeable lithium-ion battery
Playback Time (up to)up to 14 hours of battery life between micro-USB charges
Features14-HOUR BATTERY
BEATS DUST, SPLASHES, AND FLOATS
OUTDOOR & PODCAST MODE
DimensionsHeight: 4.09 in (104 mm)
Width: 0.31 ft (95.3 mm)
WeightWeight: 14.81 oz (420 g) (speaker only)
Package ContentsULTIMATE EARS WONDERBOOM 4
Bungee (attached to product)
Quick Start Guide ( printed inside the box)
Shipping weight0.62 kg
Package size132 × 118 × 115 mm

Other versions of this model

3 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I confirm the WONDERBOOM 4 is performing at its 86 dBC normal or 87 dBC outdoor sound level after setup?

Press the Outdoor Boost button; the speaker tone changes and volume increases to the 87 dBC outdoor setting, while the default mode runs at 86 dBC.

What comes in the box with the gray WONDERBOOM 4 and what must I purchase separately?

The package includes the speaker with attached bungee loop and a printed Quick Start Guide; a micro-USB charging cable and power adapter are not included.

Which version of the WONDERBOOM 4 should I choose for 14-hour playback and IP67 waterproofing?

This single gray model (984-001879) already provides 14 hours of battery life, IP67 dust and water resistance, and floatability — no other capacity or version is offered.

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