4-inch full-screen touch,Timed message: set the time to automatically play the message content.Support automatic song playback when powered on. Power-off memory function: remember the last playback status before shutdown,Sound effect function: support normal. Rock, classical, jazz, and other sound effects,Support doorbell trigger function, DB+GND. Support linkage trigger to , GND+trigger to play,Support linkage trigger to start, GND+trigger to play, expenditure trigger to shut down, GND+timing output. Support timing output level signal to link with other devices, GND+timing output,Timed power on and off, custom timed power on songs. Product specifications: Main screen size: 4 inches Resolution: 480x480IPS resolution Touch screen: full screen touch Body memory: None Extended TF card memory: 32GB Wired network port: not supported WIFI: not supported Output power: 2x25W (TI digital amplifier) Output impedance: 4-8 ohms Total harmonic distortion: 0.03% (1W.1KHZ) Frequency response: 20Hz-20KHz Audio signal-to-noise ratio: 98db Sound effect adjustment: support treble and bass sound effect adjustment Wireless speaker: support Bluetooth wireless speaker 485 function 485 communication control (optional) Audio format: MP3, WAV, WMA, FLAC, APE, DTS, ACC, AC3, OGG and other audio formats Video formats: MPEG-1/2/3/4, RM/RMVB, WMV, MOV, , VOB, , 3GP, H, 264 and other video formats Photos: JPGE, BMP, GIF, PNG and other formats Radio: Built-in fully digital automatic FM radio, 30 stations stored Audio input: AUX, one group Audio output: one group (AV) Infrared remote control: support Some accessories are shipped with random colors and styles, can not be chosen the specific ,which will not affect the use Colour:White Material:Plastic Package Contents: 1x host with installation accessories 1x remote control (without 2 AA batteries) 1x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.