Rolling Square Tau Power Bank is a smart and stylish Power Bank for smartphones and tablets, with a capacity of 1,400 mAh. It can charge devices via USB-C, Lightning or Micro-USB connectors.

Tau is compact and can easily be taken with you on the go, thanks to its small size and key-bundle functionality. You can carry your keys and the Power Bank together, thanks to the small metal hook that sits on the Power Bank.

In addition, a magnetic charging dock is included, which can be placed on the wall or desk. The magnets will ensure that the Power Bank sits correctly while charging. The dock can hold up to 350 grams, so you can carry several keys while your Power Bank is being charged.