Does this keyboard hold any size / type of phone?

The product description mentions a phone holder, but it does not specify compatibility with different sizes or types of phones.

Questions & Answers: Professional Gaming Keyboard Rainbow LED Backlit with Phone Holder Removable Hand Rest Mechanical Feel 104 Keys Waterproof for PC Laptop Grey

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Professional Gaming Keyboard Rainbow LED Backlit with Phone Holder Removable Hand Rest Mechanical Feel 104 Keys Waterproof for PC Laptop Grey