Portable MP4 Player with Speaker Touch/Button Full Screen Music Player BT HiFi MP3 Walkman Support FM Radio Recording E-Book

High-concerned chemical : None External Memory : Yes Audio Video Support : MP4 Audio Format Support : MP3 Built-in Speaker : Yes Brand Name : ALLOYSEED Origin : Mainland China Display Size : 2" - 4" Display Resolution : 320x240 Certification : None Lossless Music Player : HiFi MP4 Walkman Portable MP3 Player : Voice Recorder Origin : Mainland China Color : Black Storage media : TF card (up to 512GB) (not included) Working temperature : -20℃-85℃ Operating system support : Windows98/Window XP/VISTA/Window7/Window10 and above File system support : FAT32, ExFAT Screen size : 2.4 inches Screen features : TFT/TRANSMISSIVE dot matrix screen 240RGB*320Dots Screen visible area : 36.72*48.96mm Buttons : capacitive touch buttons + mechanical buttons Transmission interface : Type C USB Interface transmission speed : High-speed USB2.0 (up to 20MB/s transmission) Bluetooth-Compatible version : Dual-mode 5.3 Microphone : Built-in dual capacitor microphone Built-in lithium battery : 3.7V 260mAh Battery life : about 38 hours in music screen saver mode Charging time : about 2 hours (tested with 5V/1000 mAh charger) APE : bit rate Fast/Normal compression (800Kbps-1000Kbps) WMA : bit rate 5kbps-384kbps FLAC : bit rate L0-L8 (1000Kbps-1200Kbps) Signal-to-noise ratio : 100db Total harmonic distortion : <0.01% Headphone drive capability (DACLR) : 32R 0.654Vrms 13mW Brightness adjustment level : 0~5 levels Screen saver time setting : 10s~60s/long light Speed change level : -9~+9 levels Product size : about 70*50*9mm/2.76x1.97x0.35inch Packaging size : 140*84*35mm Gross weight : 100g