Fangrui Product Details Product Overview: Dy-f5wl Is A One-to-one Segment Trigger Control Player; Low-level Signal Trigger; Support Mp3, Wav Decoding Format; Can Segment Trigger 9 Tracks; 3.7-5vdc Wide Voltage Power Supply, Direct Drive 4-8 Speaker, The Maximum Output Power Is 5w; Onboard 32mbit (4mbyte) Flash Storage, Connect The Computer To Change The Audio File Through The Usb Data Cable; The Volume Can Be Adjusted; A Variety Of Trigger Working Modes Can Be Set, Suitable For Many Scene Applications Product Characteristics: 1. 3.7-5vdc Wide Voltage Power Supply 2. 9-way One-to-one Trigger Interface, Triggering Up To 9 Tracks 3. Low-level Signal Trigger (s1...s9 And Gnd Short-contact Trigger) 4. Support Mp3, Wav Decoding Format, Support Audio File Sampling Rate Up To 48khz 5. The Audio File Can Be Connected To The Computer Through The Usb Data Cable, And Comes With 32mbit (4mbyte) Flash Storage 6. Comes With 5w Class D Power Amplifier, Which Can Directly Drive 43w, 81w Speakers 7. Dip Switch To Set 8 Trigger Working Mod