Check the listing for details. [ Flyron FNP-704 ]Mini PIR Motion Sensor Activated Audio Player (USB Recordable). Condition: New. Listed at 19.95 USD. Features:Small and exquisite with MP3 high quality audio output. Adopts a PIR motion sensor to trigger audio playback, and detection range is up to 4 meters. Built-in a 4Mbytes flash memory that can store about 200 seconds of MP3 files (128Kbps). Update audio files on computer using a USB data cable. It works like a USB flash drive on computer. No need anysoftware. Supports two triggering modes: all loop repeat mode and single repeat mode. Built in 1W 8ohm speaker. Sound is clear and loud. Two-level sound volume adjustment. Supports two power supply modes: 3 pieces AAA alkaline batteries or an external power adapter through the micro USBport. Mounting holes are available on the back, and with a holder it's easy to install.Dimension: 60mm x 95mm x 31mm