Net Weight: 60g
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 15 db after use and does not need any supplementary electricity, it is absolutely environmental friendly.
Patent Number: M394726, ZL201020287363.5
Made of TPR material, pliable and abrasion-resistant.
Made of PC material, heat and impact resistant.