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ACEFAST K4 Go Waterproof Portable Bluetooth Speaker
ACEFAST K4 Go Waterproof Portable Bluetooth Speaker
ACEFAST K4 Go Waterproof Portable Bluetooth Speaker
ACEFAST K4 Go Waterproof Portable Bluetooth Speaker
ACEFAST K4 Go Waterproof Portable Bluetooth Speaker
ACEFAST K4 Go Waterproof Portable Bluetooth Speaker

ACEFAST K4 Go Waterproof Portable Bluetooth Speaker

Price: $53.99

ACEFAST K4 Go Waterproof Portable Bluetooth Speaker

$53.99

Shipping & Returns

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Shipping & Delivery

  • Estimated arrival Nov 18 – Nov 30
  • Free shipping on orders $50+
  • Tracking link by email

Shipping cost$3.99 per order, no matter how many items you buy. Free on orders of $50 or more.

Processing time1–4 business days. Every order is inspected and packed securely before it ships.

Delivery time5–10 business days after dispatch.

TrackingYou’ll get a tracking link by email as soon as your package ships.

No surprise fees for U.S. ordersThe price you see at checkout is all you pay.

International shippingWe ship to 40 countries, including the U.S. The same shipping rates apply everywhere, shown in your local currency at checkout.

Delivery Guarantee

  • Covered at no extra cost
  • Full refund if your package is lost
  • We handle carrier issues for you

Every order is coveredYour package is covered from dispatch to delivery, at no extra cost to you. We monitor shipments and handle delivery issues with you.

Lost in transitIf the carrier confirms your package is lost, we refund you in full.

Stuck or not deliveredMost orders arrive within 5–10 business days after dispatch. If your package stops moving or doesn’t arrive within our guarantee window, even without a carrier notice, we refund you in full. See our shipping policy for details.

Damaged or wrong itemSend us clear photos and a short video, and we’ll review it and arrange the next steps.

No carrier claimsYou never have to file a claim with the carrier yourself.

Returns & Refunds

  • 14 days from delivery to start a return
  • Returns accepted for any reason
  • Refund to your original payment method

14-day return windowStart your return in our Return Portal within 14 days of delivery.

Personal reasonsChanged your mind, no longer need it, or ordered the wrong product by mistake. Items should be unused, in their original packaging with all accessories. Return shipping costs or deductions may apply.

Order issuesWrong item received, missing item, or item damaged on arrival. Just send us clear photos and a short video.

Product issuesDefective or damaged product, or an item that doesn’t match its description. Just send us clear photos and a short video.

RefundsApproved refunds go back to your original payment method within 3–10 business days after inspection.

Product Details 

The ACEFAST K4 Go Waterproof Portable Bluetooth Speaker delivers clear, full-range sound in a compact, rugged design. Perfect for outdoor adventures or home use, it keeps your music playing with reliable Bluetooth connectivity and durable, waterproof construction.

Compact, Durable Sound for Every Adventure

  • Waterproof IPX7 Rating: Enjoy music worry-free near water, rain, or pools without damage.
  • Full-Range Audio: 45 × 45 mm speaker unit produces clear sound across lows, mids, and highs for immersive listening.
  • Bluetooth 5.4 Connectivity: Ensures stable wireless connection up to 32.8 ft (10 m) for effortless pairing with devices.
  • Long Playback Time: Up to 8 hours of continuous music on a single 900 mAh charge for extended enjoyment.
  • Compact and Lightweight: Measures just 3.94 × 1.57 × 3.07 in (100 × 40 × 78 mm) and weighs 0.44 lbs (200 g), easy to carry anywhere.

Portable Speaker That Keeps Up with Your Lifestyle

Designed for mobility, the K4 Go fits in backpacks, bags, or even your hand, making it perfect for trips, workouts, or casual listening. Its IPX7 waterproof rating ensures you can use it by the pool or in light rain without concern.

The full-range 45 × 45 mm speaker delivers 5 W of output, balancing bass and treble for crisp, natural sound. SBC and AAC codec support enhances audio quality across compatible devices.

With Bluetooth 5.4, pairing is fast and reliable, and the wireless range of 32.8 ft (10 m) allows freedom of movement without interruption. USB charging fully powers the 900 mAh battery in just 1.5 hours.

Its sturdy plastic and mesh construction ensures durability while remaining lightweight, combining portability with resilience for everyday adventures.

Reliable Sound Anytime, Anywhere

The ACEFAST K4 Go speaker offers compact, waterproof, and high-quality audio, making it an ideal companion for outdoor activities or home enjoyment. It’s a versatile speaker built for convenience, durability, and continuous entertainment.

Technical Specifications

Specification Details
Brand ACEFAST
Model K4 Go
Product Type Portable Wireless Speaker
Material Plastic, Mesh
Dimensions 100 × 40 × 78 mm (3.94 × 1.57 × 3.07 in)
Weight 200 g (0.44 lbs)
Audio Crossover Full-Range
Speaker Unit 45 × 45 mm (1.77 × 1.77 in) Full-Range ×1
Output Power 5 W
Frequency Range 65 Hz – 20 kHz
Channels 1
Codecs Supported SBC, AAC
Bluetooth Version 5.4
Maximum Wireless Range <10 m (32.8 ft)
Battery Capacity 900 mAh
Charging Time 1.5 hours
Playback Time Up to 8 hours
Input Power <25 W
Waterproof Rating IPX7

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