Shenzhen Ruidingbao Technology Co.,LTD

12.from the RS232 port, can cascade many button board , every button with LED or without LED.

This amplifier media player designed as a cost efficient solution.It supports Full HD 
screens, and the new function is the Internal audio Amplifier for Stereo loudspeaker.
it is widely used in the supermarket, banks, restaurants, retail stores, hotels, museums, 
exhibitions, art galleries, parks...as well as other Commercial applications, Presenting 
your products with images and videos in a slide show can easily capture the attention of 
a target audience.

This player can auto play and loop play when power on with cables connected and SD card
inserted, the player instantly plays the content on the screen. It support 2 led buttons or 4 buttons
without LED(or support 3 led buttons or 6 buttons without LED.Each button can be defined as a video,
music or photo,or file.so if you press any button,it will play the files correspondingly.