# Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports

Grestar’s UK to USA travel adapter combines one Type B AC socket with two USB-A and two USB-C ports for charging while travelling. It is an adapter, not a voltage converter, so connected appliances must support the destination voltage.

- [Original product page](https://bargainpostbox.co.uk/product/grestar-uk-to-usa-type-b-travel-adapter)
- [View offer](https://bargainpostbox.co.uk/visit/grestar-uk-to-usa-type-b-travel-adapter)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: grestar
- Model: SF20251007B0FFMHMJVC\_B0FFMHMJVC\_3\_2MUWii
- Category: Electronics > Electronics Accessories > Cables & Adapters
- Price: 8.39 GBP
- Previous price: 9.99 GBP
- Discount: 16%
- Price checked: 2026-11-12T17:48:17.918Z
- Rating: 4.6 / 5
- Reviews: 98

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- One AC socket and four USB ports provide connection options for multiple devices from one wall outlet.
- The listing says it can charge up to five devices simultaneously. Combined USB output is listed as DC 5V 3.4A, 15W-17W.
- Compact dimensions are listed as 7x5x7 cm.
- The listed destination compatibility includes the USA, Canada and Mexico, among other countries. Japan is explicitly excluded.

## Pros

- Four USB ports alongside one AC socket can reduce the number of separate charging plugs needed.
- Useful for travellers taking several USB devices, with customers reporting compatibility and multi-device charging.

## Cons

- It does not convert voltage, which limits use with appliances that are not rated for the local supply.

## Specifications

### Identity
- Brand: grestar
- Model: SF20251007B0FFMHMJVC\_B0FFMHMJVC\_3\_2MUWii
### Connections and electrical details
- Plug type: Type B
- Number of outlets: 1
- Input voltage: 100 Volts \(AC\)
- Output voltage: 120 Volts \(AC\)
### Charging
- Port configuration: 1 AC socket + 2 Type C +2 USB A
- Maximum USB-C output per port: 3.0A Max
- Maximum USB-A output per port: 2.4A Max
- Combined USB output: DC 5V 3.4A, 15W-17W
### Physical details
- Dimensions: 7x5x7 cm
- Colour: White

## Before you buy

- This is a plug adapter, not a voltage converter. The listing says appliances used abroad should support dual or multi-voltage input from 100-250V.

## A good fit for

- Travellers from the UK who need a Type B plug adapter for the USA, Canada or other listed destinations.
- People wanting to charge several USB devices from one wall outlet.

## Less suited to

- Users who need a voltage converter for appliances that do not support the destination voltage.
- Travellers going to Japan, which the listing says is not supported.

## Customer feedback

Customer feedback highlights perceived compatibility and functionality, including use on trips to the USA, as well as the convenience of charging several devices from one wall outlet. These reports align with the listed Type B socket and four USB ports, though the stated combined USB output is 15W-17W. Feedback also describes the adapter as good value, while aggregate ratings include a small lower-star portion, so experiences are not uniformly positive.
- Positive themes: Customers report that the adapter works for trips to the USA and can charge several devices from one wall outlet.
- Positive themes: Customer feedback describes it as good value for money.

## Frequently asked questions

### Does this adapter convert voltage?
No. The listing states that it is not a voltage converter. Check that each appliance supports the local supply, with the listing advising a 100-250V input range.
### How many devices can it charge at once?
The listing claims up to five devices, using the single AC socket and four USB ports. It specifies combined USB output of DC 5V 3.4A, 15W-17W.
### Can I use it in Japan?
The listing explicitly says Japan is not included in its destination compatibility.

## Alternative options

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- [Mscien UK to US Plug Adaptor with 3 USB Ports, 7-IN-1 Plug Adapter, USB-C \| Type B Travel Plug for US, Thailand, Mexico, Canada, Grounded, Compact Design, Essential Travel Accessories,](https://bargainpostbox.co.uk/visit/grestar-uk-to-usa-type-b-travel-adapter)
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## Add-ons

- [MOBIBAY Pack of 5 UK to US Plug Adaptor Type G to Type A and B from UK to USA, Canada, Australia, Jamaica, Barbados,Mexico,Th](https://bargainpostbox.co.uk/visit/grestar-uk-to-usa-type-b-travel-adapter)
- [TESSAN Universal Travel Adapter Worldwide with 2 USB C and 2 USB A Ports \| Universal Plug Adaptor UK to World, International](https://bargainpostbox.co.uk/visit/grestar-uk-to-usa-type-b-travel-adapter)

## Images

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 1](https://bargainpostbox.co.uk/i/Xl15v0b7td0M-T8lrSV7Mmd4LWDOSQu-BCF2B3EpbWU7ijFjDcKae1Lu3jvvh602a0sRd1VqB41Rcl6UkYZkw9hub2kovoGwi-opWANJhNC53ggkESJgow8X.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 2](https://bargainpostbox.co.uk/i/I6Hv8Lj6HglN7LEr4s_ylxMh_TiwGiZm1wUg7QOK1qdaT5113aS-5i3jqqnJtSfEfBy1WXbKrAIXsFgeqOAr40jT8-GB1wDXYZdooRLTb1Hr40nWUh3BrAFS.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 3](https://bargainpostbox.co.uk/i/D-2D5JPAH8NBquV3Ew1aNZNow9gMitXrJ64V6-LO2MIOvyACCSiaV12srSfmukIAdNSLx8OmyZR86zzvbRafKgcCDL6zec7grmrwl98IAfWTdH72xQW1nt8D.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 4](https://bargainpostbox.co.uk/i/v3xaLBuUB-vTcRLYxqxfjH4DWCZHuwDJ1yg9Wq-MF_uYdeT3Om5pHBKD1Fr_ePePOLHhyHBvgTEjuR7bBraeIkQxidta413vJu0GDQEPtJ9kJh42izO69p7e.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 5](https://bargainpostbox.co.uk/i/gAPGmMKLnSEABNbIVecghcwnQxADqH7QymIVweC7e63NoGggAJszmkiW3-ypT8wIT5mPhrxwcYRL5WLI9Y310XSADTl1w-cuEEOMjJ6JbBM1X9nKtC8I73RY.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 6](https://bargainpostbox.co.uk/i/m51xULO36WBBG4HReQY2N6gNJpOJWhWzJ_W44XMr_8YZoxgK_Lg8KCYFhyyiggaBcJGHvvvGyWkcFUKDR0T_X7Gq7U0bOahiqBFuJHGImHabxT0wlUF17MMx.jpg)

![Grestar UK to USA Type B Travel Adapter, 1 AC Socket and 4 USB Ports — 7](https://bargainpostbox.co.uk/i/zMo7lbHfPy7-kZZ4FbeYJfRfLYUnA8kqZHDKWunPwxBWsBVe--R9WCmsOOLk5pX26zvmYJyPsqXglUwTpZgQwOSxY1paI4VWbZ37DftHtppVGq1Z0Z40PwJL.jpg)