Warmly Tips: The player supports installation of applications. But not support installation for ! Use Tip: When the bottom button panel disappears, slide up on the screen and the bottom button appear. Similarly, clicking the button "V" hide the bottom button. About this item: Screen Size: 4.0 inch Battery: 1500 mAh Battery Type: lithium polymer battery Support: WiFi and Bluetooth IPS Touch Screen Built-in Memory 2+16GB (TF expansion card supports up to 256GB) Charging Time: 60 Minutes Standby Time: About 500 hours Battery life 30-40h In screen saver state4-6 hours of video Play Mode: repeat play, single cycle, whole cycle Music playback time: 30 hours (laboratory data) Video playback time: 10 hours (Lab data) Expansion slot: Micro-SD/TF card Charging/data interface: USB-C FM Radio: supported Music Format: MP3, WAV, FLAC, APE, OGG, M4A, AAC, MP2, MID, ACELP Video Format: , MKV, MPG, MPEG, RM, RMVB, VOB, MOV, , , DAT, MP4, 3GP (1080p HD video can be played directly without transcoding) Recording Format: MP3/WAV Image Overview: JPEG/BMP/GIF/PNG E-book Format: EPUB, TXT, PDF, , FB2, FM Receiving Frequency: 87.5MHz ~ 108MHz Compatibility: for XP, 7, 8, 10, Vista, 2000, OS 10 Material: Metal colour: Black Package Contents: 1 x Music Player 1 x USB Cable 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.