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Long Battery Life: This motion-sensing voice alert doorbell is equipped with a high-capacity battery and requires no power connection. Based on foot traffic, it typically only needs charging every 1-3 months, with a charging time of just 2 hours. Sensitive Detection: This voice alert doorbell features a 120° wide-angle PIR motion detection module. Upon detecting a moving object, it emits a sound signal within 1 second. Suitable for Multiple Scenarios: The doorbell has a built-in English welcome voice and can also be programmed with various sounds such as ding-dong, alert sounds, birdsong, and dog barking. Suitable for shops, residences, convenience stores, hotels, and other scenarios. Supports Self-Recording: The doorbell's voice alert supports recording your own voice for playback. The recording process is very simple, supporting recordings up to 20 seconds long. Easy Installation: This motion-sensing voice alert device uses self-adhesive backing and magnetic installation. The magnetic modules are located on the back and sides, making installation very easy.