Electronic doorbell and lock system — robust fireproof ABS shell, stable chip design, and built-in high-volume speaker for clear, reliable alerts. Key benefits Safety: The outer shell is made from fireproof, flame-retardant ABS material to improve occupant safety and protect internal components. Reliable long-term performance: A sturdy design and quality construction extend service life and reduce the need for replacements or repairs. Consistent, pleasant sound: Integrated chip design delivers a stable, consistent doorbell tone so alerts are clear and not distorted. Loud, clear alerts: The built-in high-volume speaker ensures visitors and deliveries are heard even in busy or noisy environments. Product highlights Material: Fireproof, flame-retardant ABS for safety and durability. Function: Shell and components for an electronic doorbell and lock system, housing electronics and speaker. Performance: Chip-based sound control for steady, pleasant tones and a high-volume speaker for audibility. Durability: Sturdy construction designed for extended service life and dependable operation. Practical use scenarios Residential front door: Hear visitors and delivery personnel clearly at the main entrance, reducing missed packages and unexpected arrivals. Apartment or multi-unit entry: Reliable, audible alerts help building residents know when guests arrive or mail is delivered. Small office reception or workshop entrance: Clear doorbell tones help staff identify visitors in busy, noisy workspaces. Why choose this system Prioritizes safety with a fire-resistant shell. Reduces downtime and maintenance with a durable design. Improves daily usability with consistent sound quality and strong volume, so you won’t miss important visitors or deliveries. Suitable for installations where a durable, safe, and audible electronic doorbell and lock system is required.