Fangrui Product Details 1. 3.3-5.2vdc Power Supply, 3.7v And Above Are Recommended. 2. Support Mp3, Wav Decoding Format, Support Audio File Sampling Rate Up To 48khz. 3. Support Uart Asynchronous Serial Port Control, Support Play, Pause, Up And Down Songs, Volume Increase And Decrease, Eq Mode Switching, Song Selection, Specified Path Play, Specified Path Insertion And Other Functions. 4. Comes With 5w Class D Amplifier, Can Directly Drive 3w-5w Speakers. 5. Support Tf Card (memory Card), U Disk; Capacity Within 32g, Fat32 Format. Support Custom Audio Files. Standard 2.54mm Spacing Stamp Hole Design, Easy To Mount. Type:a:no Welding Colour:black Material:pcb Package Contents: 1 * Voice Player Module 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.