Specifications:

• This MP4 has built-in capacity and can also support additional TF card insertion.
• Single card version needs to insert TF card to use.
• Has Bluetooth function, can only link Bluetooth headset and Bluetooth speaker, can not link mobile phone Bluetooth.
• Computers connected to MP4 can only support Windows 7, not MAC.
• Android phones need to have OTG function in order to connect, which is not supported by Apple OS.
• Smart phones with OTG function can use the OTG adapter link to download, download MP3 format music can be used
• MP3 music and video format support Tips:
• Audio format support :MP3 format.
• Video format: Built-in capacity model supports AMV, single card version supports AVI.
• [Download video requires conversion tool to convert video format].
• Storage capacity: Supports up to 128GB cards
• Maximum output power: 18mW*2
• Frequency response range: 20Hz-20KHz
• Signal to noise ratio (dB) : 90
• Total harmonic distortion: less than 0.05%
• File access function:
• Battery Type: Built-in lithium battery (built-in)
• Screen size: 1.8-inch color screen
• Playing time (hours) : about 6 hours
• Standby time (hours) : more than 24 hours
• Audio format support: wav/mp3
• Support to listen to music, watch video, tape recorder (wav), ebook (txt format)

16GB MP3 Player Bluetooth 5.0 1.8-inch Screen Touch Buttons Portable Hi-Fi Lossless Music Player Speaker with FM Radio Recorder Alarm Clock Wired Headphones (Black)