5V DC power supply 9-channel one-to-one trigger interface, triggering up to 9 tracks Short-circuit connection between signal line and negative power supply (low-level signal trigger) Supports MP3 and WAV decoding formats, and supports audio file sampling rates up to 48kHz 32Mbit (4M) flash memory · Can be connected to a computer via USB cable to change custom voice · 3W waterproof speaker, loud sound · 8 trigger modes via DIP switch · Volume potentiometer for volume adjustment Note: 1. A data cable must be used; some USB cables are power cables and cannot transmit data. 2. The audio file name must be a 5-digit number, for example: 00001.mp3 3. When triggering playback one-to-one, the audio file must be saved in the root directory. Color: Black Material: Plastic Package Contents: 1*Player Module