Boya Smartphone Adaptor - TRS to TRRS is made by plastic PU. Connects with 3.5 mm interface and brings you stereo voice. This adaptor is made from durable plastic PU material and features a standard 3.5 mm connection, delivering high-quality stereo sound to your smartphone. Enjoy crystal-clear audio without worrying about poor connections or low-quality materials. It's crafted with high-quality plastic PU material, ensuring a secure connection and superior stereo sound. With the standard 3.5 mm interface, this adaptor easily connects to your smartphone, providing crystal-clear audio for your listening pleasure. Don't settle for subpar adaptors that compromise on sound quality - this product's durable construction and reliable connection make all the difference.