DC 9-24V wide voltage power supply 9-Channel one-on-one trigger interface, triggering up to 9 music low level trigger outputs Directly uses GND as a trigger signal Supports MP3 and WAV decoding formats, with audio file sampling rates up to 48KHz Supports TF card storage (up to 32GB), must be formatted in FAT32 (not NTFS) Micro-USB socket: Connect to PC for downloading music files Equipped with a 30W Class D power amplifier, capable of directly driving 4-8 ohm, 10-30W speakers External warning lights can be connected; output voltage matches input voltage DIP switch provides 8 trigger working modes Volume adjustable via potentiometer and volume button Module size: 76 x 58 mm 3-bit red toggle switch: Set 8 different triggering modes; device must be restarted after mode change Light/Alarm output: Output voltage same as input working voltage; compatible with alarm or warning lights Two indicators: Green when powered on, red during playback (for power and playback status) Color: Black Material: ABS Type: B - Low level trigger finished product L30TK Package Contents: 1 x Player power amplifier Note: Light reflection and display differences may cause slight variations between the item color in images and actual product. Measurement allows an error of +/- 1-3 cm.