Net Weight: 73g
Using the principle of the bugle, concentrating the voice and direct the conduction direction in order to reach the effect of increasing the volume, it can increase 13 db after use and does not need any supplementary electricity, it is absolutely environmental friendly.
Patent Number: M394726, ZL201020287363.5
Made of the environment-friendly silicone material, recyclable, non-polluting and earth-friendly.
After the dirt-resistant treatment of the surface, it can be cleaned with water, the dirt can be easily removed.