The S80 is a stand alone device, so contrary to Mobile version it does not require a smartphone to operate.
It is powered by 2 AA batteries and comes with a hard-shell carrying case.
6 mouthpieces are also included sur you can use this device for youself and friends.
After you blow in the device you will read on the display your BAC in % ‰ et g/L. For your reference the legal limit in Switzerland and in several countries is 0,05% ou 0,5‰.