1Using infrared pyroelectric principle to sense human activity information, when someone enters its sensing range, it can accurately identify human activity information. 2Large sensing angle and sensitive triggering. Intelligent triggering, no manual operation is required, and voices such as warm reminders, alarms, and greetings are issued as soon as the human body is detected. 3Can switch different voices at any time according to different applications. 4Powered by DC5V power adapter (Micro Usb interface) or 3pcs 1.5V AA dry batteries (not included). 5Adopt mature human pyroelectric induction technology, the induction distance can reach 4 meters/13.1ft. 6Support voice file replacement (o file format: MP3 bit rate: 16 - 320Kbps). 7Low voltage alert function, making it safer to use. 8LED digital tube display, it can display the currently playing track and volume level. 9Support button to switch up and down song and volume adjustment. 10Built-in 8R 2W speaker, the sound is clear and loud. 11Rainproof design, which can be used outdoors (waterproof rate IP43). 12Use universal bracket to facilitate installation and adjustment.Condition: 100% Item Type: Infrared Voice Prompter Material: ABSMain Color: Silver Power Supply: DC5V Power Adapter (Micro USB Interface) / 3 x 1.5VMA Dry Batteries (Not Included) Power Supply Mode: Standby State: 200uA Playback Status: 600mA(DC5V) o Format: MP3 Bit Rate: 16320kbps o Output Power: 8 Ohms / 2W (Typical Value) Sensing Range: 4 Meters/13.1ft (120 Viewing Angle) Volume: 100db (horizontal Distance 1m/3.2ft) Waterproof Rating: IP43 Operating Environment: -20 - 35Relative Humidity: 10 - 85% Rh 1 x Infrared Voice Prompter1 x Bracket1 x Mounting Screw Bag1 x Instructions1 x US Plug1 x USB CablePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.