the t.bone GigA Pro GT

I love the build quality on this range, it truly is a PRO range of products.
I will however say I am in no way musical and cannot test this on a guitar.
I use this unit as a transmitter to set a battery powered speaker up completely wirelessly. The range far exceeds my requirement of 120 metres, the battery life outlasts the 6 hour event length. The guutar cable allows connection to an aux send on my mixer, and the belt clip allows mounting the pack above body height on a custom bracket on a mic stand to allow for true unobstructed operation.
This transmitter successfully relays audio to multiple receivers for a multi speaker setups.