From the glacier base Restaurant in 2,840 m depth to the exit point of Mittelberg gondola at about 3,350 meters above sea level (ie across the entire glacier skiing) with a mountain range between the radio line, we had a good or acceptable voice communication.
Volume but had to max. are provided and a background noise was inevitable.
For skiing, this radio will now always be with me in the ski jacket.
Am quite impressed and can absolutely recommend this radio.
The processing could also be a little less hard plastic standard; particularly in the handle area a rubber coating for the purpose of safer maintenance would make sense and would add value to the device. Property me therefore appropriate hand loops.
I bought here on Amazon; the price was in February 2015 = EUR 28. These are worth these radios all.