Multi-Purpose Protection Ideal for home security, anti-theft, and family safety. Helps monitor entry points and deter unauthorized access. Instant Alarm The alarm triggers immediately when doors or windows are opened, enabling a quick security response. Durable ABS Construction Made of high-quality ABS material, lightweight, rust-proof, and durable for long-lasting use. Easy Cable-Free Installation Simply hang on the inner door handle with no cables or wiring required. Suitable for use at home, in the office, or in a factory. Use scenarios - Home entry doors: place on main doors to alert occupants when a door is opened, enhancing family safety and deterrence. - Office or storefront after hours: monitor access and trigger alerts to deter intruders. - Factories or storage areas: safeguard restricted spaces and support safety monitoring without complex installation.