Motion sensor audio player ' s detection range is up to 16.5ft(5m),sensing range up and down 60°,Let and right 110°. It will trigger the sound remind you when someone or animals enter and move in the monitored area. Music files can be customized（Download MP3 music files by computer）,Supports single song or loop playback. Customize your chimes, your MP3 sound file will playback automatically after the PIR sensor detects movement. Included mounting screws, mounting accessories, USB cable, Double-sided adhesive stickers. Indoor festival music decorations ,New Year and christmas party fun music,entrance door greeting, animals bird call or alert. Install front doors, window frames, depot, and anywhere you want to be playing music to motion. Two power modes,Operates with 3 AAA batteries (Not Included batteries ) or optional to be plugged in DC5V (USB Cable Included,Not Included DC5V plug) for external power supply.If you have any questions about the product, please contact us immediately and we will reply you within 24 hours. This product uses PIR infrared human body sensing technology, when someone passes through the sensing area, it will immediately trigger the broadcast voice. The voice content can be replaced by connecting to a computer. The appearance is simple, the operation is simple, and the installation is convenient.