**********1. High-quality metal shell, wear-resistant and durable. *****2. Use high-quality plastics, high strength, tensile strength is not easy to break. *****3. Better shielding design, providing pure sound. *****4. Suitable for home audio, karaoke audio, professional stage audio and other equipment. *****5. 30 days unconditional money back guarantees the quality of our after-sales service, you can rest assured to buy our products.