USB mini air cooler fan, add water to soak the cooling filter, ambient air is forced through the wet cooling filter and cools down, works best in dry and hot climates, rotatable turbine wheel allows adjustment of the cool breeze of air, humidifies air - makes breathing comfortable and alleviates allergies, variable power control, comfortable adjustable leather strap, can cool air up to 30F provides gentle cool breeze 3, utilizes a 30db whisper-soft turbine system.