Wireless Motion Sensor Doorbell Automatic Door Bell MP3 Audio Player Welcome PIR Detector Alarm

Features : Pyroelectric infrared sensor induction. AAA batteries or Micro USB power supply. Have micro USB interface, able to replace audio files through micro USB interface by USB cable on computer. Power-off memory function. Built in 4Mbyte FLASH memory. Built in 29mm 8Ω1 watt speaker. MP3 audio format. Specification :Alarm: YesDetector: Infrared detector, automatic inductionInduction range: Less than 4m, within 45 anglePower supply: 3 batteries or USB power adapterFunction: Audio downloadable from computer by USB cableMemory: Built in 4M byte Flash memoryInstallation: Ceiling mounted or wall mountedAudio format: MP3 audio formatSample rate: 44.1Khz/320Kbps Package Includes :1 x Wireless Motion Sensor Doorbell Details Pictures :