The Grandmax Go Rock Portable Speaker provides room filling sound in a small ,self-contained , easily transportable package. Simply twist open to expand the acoustic chamber for enhanced audio and crystal clear sound. All connections retract into the body of the speaker leaving  no messy cords to untangle. The built-in long-life lithium battery lasts for hours and quickly recharges from any USB port with the supplied charge cable.

Features:

• Unique patented twist open pop-up acoustic chamber delivers enriched audio response  
• Frequency-tuned amplifier delivers crystal clear sound reproduction  
• Built-in long-life rechargeable lithium battery. Simply recharge with the supplied USB charge cable  
• 3.5 mm audio plug connects to iPod, iPhone, laptop and other popular devices

Specifications:

• Compatibility: iPod/MP3 Players and Laptops  
• Audio Plug: 3.5 mm / 0.13 inch  
• Battery Type: Lithium battery  
• Port: USB

Model: SPKR-GR1-BUN1

• Amplified: Yes
  
• Brand: Grandmax
  
• Number of Speakers: 4
  
• Type of Computer Speakers: Multimedia
  
• USB Ports: 1
  

Standard shipping via UPS Ground is included in the quoted price. The estimated delivery time will be approximately 3 - 5 business days from the time of order.

Express shipping is via UPS. The estimated delivery time will be approximately 1 - 2 business days from the time of order.

Please choose your shipping method at checkout.

An additional Shipping and Handling fee will apply to express shipments. This fee will be quoted at checkout.

*Delivery is available to Alaska, Hawaii and Puerto Rico. An additional Shipping and Handling fee will apply to shipments going to Alaska, Hawaii or Puerto Rico. This fee will be quoted at checkout. Additional transit time may be required.

Costco.com products can be returned to any of our more than 600 Costco warehouses worldwide.

Membership: We will refund your membership fee in full at any time if you are dissatisfied.

Merchandise: We guarantee your satisfaction on every product we sell with a full refund. The following must be returned within 90 days of purchase for a refund: televisions, projectors, computers, cameras, camcorders, touch screen tablets, MP3 players and cellular phones.

How to Return: For an immediate refund (including shipping and handling), simply return your purchase at any one of our Costco warehouses worldwide. If you are unable to return your order at one of our warehouses, please email customer service or call our customer service center at 1-800-955-2292 for assistance. To expedite the processing of your return, please reference your order number.

If you request an item be picked up for return, the item must be packaged and available for pick up in the same manner as it was delivered.
If your order was delivered "curb side", it will need to be available for curb side pick up.
If the item arrived to you in a box, it will need to be in a box at the time of pick up.