Features: 1. Waterproof cover is especially suitable for winter; 2. It can minimize the influence of snow, condensate and fog on the button; 3. Transparent material, clearly see the button indicator light, remind whether the product works normally and replace the battery in time; 4. Local protruding and humanized design; 5. Press the button easily without rubbing your fingers; 6. Tough material, anti falling, prevent strangers from damaging the button.
