Reliable Home Alarm System: This smart and independent wireless alarm system features a wireless infrared motion sensor with excellent burglar alarm and voice buzzer functions, making it ideal for homes, shops, offices, and entertainment centers. The handheld remote control allows you to easily arm/disarm alerts with a single button. Great Convenience: The wireless infrared motion detector doorbell has three built-in modes—alarm, home, and smart—which can be easily set according to your needs. In alarm mode, the wireless alarm sound lasts for 20 seconds. In welcome mode, welcome messages in 11 languages (including French) are available, providing multiple voice prompts. Dual Power: The motion sensor with alarm can be externally connected to a DC5V power supply (not included) and has built-in 3 AAA batteries (not included) to ensure sufficient power. A low battery reminder allows you to change the battery in time without worrying about losing power or the alarm failing. Color: White Size: 61*53*92mm Quantity Sold: 1 piece Note: 1. Due to different lighting and screen settings, the product color may differ slightly from the picture. 2. Due to different manual measurements, please allow slight size differences.