DC 9-24V wide voltage power supply9-Channel one-on-one trigger interface, triggering up to 9 musicLow level trigger version and directly using GND as a trigger signalSupports MP3 and WAV decoding formats, and audio file sampling rates up to 48KHzSupports TF card (up to 32G) storage and must be in FAT32 format(not NTFS)Micro-USB Socket: Connect to PC and download music files.Equipped with a 30W Class D power amplifier, it can directly drive 4-8ohm, 10-30W speakersExternal warning lights can be connected and voltage is same to input voltageDIP switch is set with 8 trigger working modesPotentiometer and volume button adjusts volumeModule Size:76X58mm3Bit Red Toggle Switch:Set 8 different triggering modes, which must be powered on again after changing the mode.Light/Alarm Output: Output voltage is the same to input work voltage. It can connect alarm/warning lights.Two Indicator: Green after power ON and red when playing. (For Power supply and Playback)Colour:BlackMaterial:abstype: B: low level trigger-finished product L30TKPackage Contents:1 x Player power amplifierOnly 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.