This product is used to connect and extend two existing telephone lines with R11 telephone head (6P4C, 6P2C crystal head) at both ends through telephone through box. It has high fidelity sound quality and design, simple and practical, high fidelity design, exquisite workmanship, strong anti-interference ability and low signal attenuation coefficient.
Small and exquisite, compact and durable: compress all the spare space, accurate signal transmission, high efficiency and durability.