Shell: ABS+PE film, waterproof, dust-proof, corrosion resistant and destructive. Receivers, keys, buzzers, circuit boards, enclosures and all accessories adopt multi-layer waterproof, dust-proof and no gap structure. The telephone has good stability and strong anti-interference ability, which is in line with the national standard GB/T 15279-94. The enclosure has a grounding device and is completely isolated from the internal circuit and has a certain electromagnetic shielding effect. When speaking, the voice is clear, the voice is loud, and no response whistle. Waterproof, dust-proof and easy to clean. You can save two sets of speed dial, and you can also choose to dial randomly. The machine is super thin, light and beautiful, with wall mounted design and no screws on the surface. It can be made into two installation modes: embedded or wall mounted.