• Support MP3 format, automatic power play, play the red LED indicator light update.
• Support U disk (tested 32G), TF card (tested 16G) playback mode; power default TF card mode, if the TF card does not automatically jump to U disk mode, and both devices are installed, you can manually Set the playback mode. For details, see the key operation.
• Press the button to adjust the upper and lower track switching, volume + -, pause / play, mode switch. For details, please refer to the key operation.
• Press "Repeat" to change the cycle mode. Press "Repeat" to change the cycle mode.
• Super sound, on-board 2W mono power amplifier (5V power supply up to 3W) directly connected speaker (recommended with 4Ω 3W speaker), 3.5mm gold-plated headphone jack can be connected headphones or external sound.
• With a MicroUSB power supply interface, mobile phone data cable through the use of mobile power or USB charger, can also be used 3.7V lithium battery, USB 5V power supply.
• Support TF card (mobile phone memory card), U disk playback mode.
• With speaker terminals without welding, easy wiring.
• Modular design to facilitate conversion

• "Prev / V--" key: "short press" to switch the "last song", "long press" to "volume down"
• "Next / v ++" button: "short press" to switch the "next song", "long press" to "volume up"
• "P / P / Mode" button: "short press" to "play / pause" switch, "long press" for the U disk, TF card "mode"
• "Repeat" button: "short press", "single / full song" cycle switch (no long-press function)

• "long press" time about 2S
• If the use of U disk mode, the proposed 5V power supply, some U disk does not support 3.7V power supply.