Is it ok / safe to plug this into a travel adapter so that I can use it abroad, like in Europe?

They are safe and can be used in Europe through adapters

Questions & Answers: Surge Protector Power Strip with 5-Foot Flat Plug Extension Cord, 6 Wide Outlets and 4 USB Ports (1 USB-C), with On/Off Switch, Overload Protection, Dual Voltage 110V/220V, US Plug for Home Office

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BBJY
Item#: 9SIBM17KTG0817
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Surge Protector Power Strip with 5-Foot Flat Plug Extension Cord, 6 Wide Outlets and 4 USB Ports (1 USB-C), with On/Off Switch, Overload Protection, Dual Voltage 110V/220V, US Plug for Home Office

Provides centralized power access for multiple devices.
Features multiple outlets and surge protection.
Offers flexible reach with an extended power cord.
Designed with safety features such as overload protection.

$9^.99 –