If you ski off-piste, it is more a requirement than a thought to have a avalanche beacon that always sits on the body and shovel and probe, which always are stuffed in your backpack. There is also a good idea to train properly so that you know how it works. All models are compatible with each other and the models with three antennas are far easier to learn and to use.
If you need all three components of the basic avalanche equipment, there are discount packages ready under the category Avalanche Packages. Select the beacon you prefer from the leading brands in the industry, Mammut, Ortovox and Pieps.