constant fixed tone

[NHM]

Does anyone know of a pedal that gives out a constant fixed tone (with a presetable pitch) - like a sine wave generator? I guess like an organ pedal but in a compact box. 

[itu]

https://www.tcelectronic.com/product.html?modelCode=0709-AJT 

tce Infinite 

 

Freeze from EHX? 

 

Synth pedals, like Future Impact? 

[NHM]

Thanks for the recommendation, the Freeze looks as though it will do what I want.

[BigRedX]

Some of the synth modules in the Helix will do this.